Answer: The third law.
Explanation:
While walking down Madison Avenue, Thomas smelled smoke. Soon, Thomas saw flames leaping out of a third story apartment window. In a flash, Thomas saw another man run into the burning building and emerge, only a minute later, with a young girl in his arms. Witnessing this made Thomas feel hopeful about humans and our ability to help each other. Thomas felt ________.
While walking down Madison Avenue, Thomas smelled smoke. Soon, Thomas saw flames leaping out of a third story apartment window. In a flash, Thomas saw another man run into the burning building and emerge, only a minute later, with a young girl in his arms. Witnessing this made Thomas feel hopeful about humans and our ability to help each other. Thomas felt the diffusion of responsibility
What is the diffusion of responsibility?When there are additional witnesses or bystanders present, a person is less likely to accept responsibility for their actions or inaction, which is known as the "diffusion of blame" sociopsychological phenomenon.
When those who need to decide wait for someone else to take action in their place, responsibility is diffused. The more people participating, the more likely it is that no one will take action because they assume someone else in the group will probably take the initiative.
Diffusion of responsibility in the workplace can be seen, for instance, when an employee engages in offensive behavior toward another and they fail to report it because they feel it is not their place to do so.
The "bystander effect" and "diffusion of culpability" are two terms for the same psychological phenomena
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A billiard ball is rolled off of a table onto the floor below in projectile motion. If the speed at which the bowling ball left the table was 12m/s, then what is the x-component of the velocity of the bowling ball at the instant before it strikes the ground?
The x-component of the velocity of the bowling ball at the instant before it strikes the ground is 12 m/s.
What is the horizontal velocity of a projectile?
The horizontal velocity of a projectile motion is the velocity of the projectile along the horizontal axis or x component of the velocity.
During a projectile motion, the vertical velocity of the projectile decreases as the projectile moves upwards and eventually becomes zero as the object reaches the maximum height. The vertical velocity also increases as the projectile moves downward and becomes maximum before the projectile hits the ground.
However, the horizontal velocity of a projectile remains constant since horizontal motion is not affected by gravity. This means that the initial horizontal velocity is equal to final horizontal velocity.
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Based on many surveys of the average density of matter in the universe (regular matter and dark matter), astronomers now conclude that the average density of the universe is
a. less than the critical density
b. exactly equal to the critical density
c. more than the critical density
d. essentially equal to zero
e. so great that the universe will experience a "big crunch" before the Sun becomes a red giant
b.
The answer is B i.e., exactly equal to the critical density.
What is critical density?
"Critical density" is the average density of matter required for the universe to stop expanding after an infinite amount of time. The critical density universe is said to be flat.
In General Relativity, Einstein showed that the gravitational effects of matter should bend the space around it. In a matter-filled universe, both its overall shape and fate are determined by the density of matter contained.
If the universe has a high matter density (a closed universe), self-gravity will stop the expansion and slow it down until it eventually collapses again. In a closed universe, locally parallel rays converge to a very distant point. This is called spherical geometry.
If the universe has a low matter density (an open universe), there is not enough self-gravity to stop the expansion, and the universe will continue to expand forever (albeit at a slower and slower rate). Finally, in an open universe, locally parallel rays diverge. This is called hyperbolic geometry.
There is a universe where parallel rays remain parallel, balanced by a knife blade between a high matter density universe and a low matter density universe. This is called flat geometry and its density is called "critical density". In a critical density universe, it takes an infinite amount of time to stop expanding.
Therefore, The answer is B i.e., exactly equal to the critical density.
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A 2.0 kg block slides on a frictionless 15° inclined plane. A force parallel to the inclined plane is applied to the block. The acceleration of the block is 1.5 m/s? downhill. What is the applied force?
The applied force on the block sliding on the frictionless inclined plane is 1.9 N.
What is friction?Friction is the force that opposes the sliding or rolling motion of one body relative to another. For example, when you want to stop or slow down, you use your car's brakes because the friction created between the brakes and the wheels slows down or stops the car.
The unevenness of the two contact surfaces creates friction. When an object rides on another object, the surface irregularities become entangled and friction occurs. The rougher the surface, the more irregularities there are, and the greater the friction.
Equation of motion along an inclined plane:
Fₙ = (m×g×sinθ) - (m×a)
Where, Fₙ = applied force
m = mass of the block (2.0 kg)
g = gravitational acceleration (9.8 m/s²)
a = acceleration (1.5 m/s²)
θ = inclination of plane (15°)
Fₙ = (2 × 9.8 × sin15) - (2 × 1.5)
Fₙ = (19.6 × 0.25) - 3
Fₙ = 4.9 - 3
Fₙ = 1.9 N
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what part of the process of star birth did you find most counterintuitive and why?
Answer: how long it took.
Explanation: i know nothing is really instant, but its ridiculous that it took over 1.6 million years for the temperature to drop to a thousand degrees after the big bang expansion. and then even after that, it took millions of years to make the first one. regardless, it is still incredible.
The setup time of a clocked flip-flop is:
A) The minimum amount of time that an input must remain stable after an active clock
transition.
B) The maximum amount of time that an output must remain stable after an active clock
transition.
C) The minimum amount of time that an output must remain stable before an active clock
transition.
D) The minimum amount of time that an input must remain stable before an active clock
transition.
The setup time of a clocked flip-flop is:
The minimum amount of time that an output must remain stable before an active clock transition.
What is a Flip flop ?A flip-flop is a device that can hold a single bit of data (a binary digit); one of its two states corresponds to a "one," and the other to a "zero." Such data storage can be used to store state, and in electronics, such a circuit is known as sequential logic.
The output state changes of a timed flip-flop can be synced to a clock pulse thanks to an additional input.
Data must be at a valid logic level at setup time (tS), which is defined as the time before the DAC clock shift.
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a nurse is teaching the guardian of an infant who has congestive heart failure about methods to preserve energy during bottle feeding. Which of the following statements by the guardian indicates a clear understanding of the teaching? a. I will feed my baby every 2 hours b. I will allow my baby to suck for 45 minutes during each feeding c. I will use a low-calorie formula for my baby's feeding d. I will stroke my baby's cheek during feeding 6
1) Babies with congenital heart disease and congestive heart failure tend to tire very quickly, making breastfeeding difficult. It is represented by the suck, rest, suck cycle, which is equivalent to dyspnea on exertion in adults. Since the baby cannot suck for a long time and is very tired for some time after sucking, the feeding is not maintained well and the baby does not gain weight and manifests as stunted growth. To do so, you need to feed your child more often. The nurse tells the patient to breastfeed more often, usually every two hours. This ensures that the child is well fed and also allows the child to wake her up every two hours to breastfeed at night. Bottle feeding is done in a similar way.
Breastfeeding is usually 8-12 times a day, and if the child has at least 6-8 wet diapers and is consistently gaining weight, breast milk or bottle feeding should be sufficient. can be assumed to exist.
Do not breastfeed for a long time at a time as this will tire your baby.
When using formula foods, high calorie foods should be used so that children can get more energy with less effort.
2) frequent negative responses.
A 2 year old child usually demands too often for things and they want what they want when they want .
It's also an age when they understand themselves as different individuals. They become less dependent more emotionally labile and may give frequent negative responses.
3) I should limit the use of fingers of broken arm .
Broken arms are splinted so that they get adequate rest to to heal the fracture and wound.
The use of the particular arm have to be reduced.
It is usuall to have a mild swelling of the fingers for initial some days but it should not last for longer.
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a force F=(4I+3J)N acts on the object of mass 2kg and drags it by moving the object from the origin to x=5m.find the work done on the object and the angle between the force nd the displacement
The work done on the object = 25 J
The angle between the force nd the displacement is 0° since the applied force is in positive x-direction.
What is work done?Work, in physics, a measure of the transfer of energy that occurs when an object is moved a distance by an external force acting at least partially in the direction of displacement. For a constant force, work can be calculated by multiplying the length of the path by the component of the force acting along the path. Expressing this concept mathematically, the work W is equal to the force f multiplied by the distance d, or W = fd. If the force is applied at an angle θ to the displacement, the work done is W = fd cos θ. Working on an object involves not only moving the entire object from one place to another, but also, for example, compressing a gas, rotating a shaft, or causing invisible motion to particles within the object. is also done by External magnetic force on the body.
Force in x-direction = 4i
Force in y-direction = 3j
For resultant force (Fₙ):
Fₙ² = 4² + 3²
Fₙ² = 16 + 9
Fₙ² = 25
Fₙ = 5 N
Since, W = F × d × cosθ
Where, W = work done
F = Applied force (5 N)
d = Distance covered (5 m)
θ = Angle between force and displacement (0°)
W = 5 × 5 × 1
W = 25 J
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. Ebo throws a ball into the air. Its velocity at the start is 18 m/s at an angle of 37° to the ground. a) Express the initial velocity in component vector form. b) Work out the velocity of the ball as it lands. Give your answer in component vector form. c) Work out the range of the ball. d) What assumptions have been made about the frame of reference?
(a) The initial velocity in component vector form is (14.38 i + 10.83 j), m/s.
(b) The velocity of the ball as it lands in component vector form is (14.38 i + 10.88 j), m/s.
(c) The range of the ball is 31.78 m.
(d) The assumption made is that the frame of reference is at ground level.
What is velocity?Velocity is described as the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time.
The component form for the velocity are:
Vx = V cosθ
Vy = V sinθ
We then have Vx = 18 m/s x cos(37) = 14.38 i, m/s
Vy = 18 m/s x sin(37) = 10.83 j, m/s
Vi= (14.38 i + 10.83 j), m/s
Using projectiles, we can get the other values
t = (Vsinθ)/g
working out t = 1.11 secs
The final vertical velocity of the ball is given as:
Vf = Vh + gt
where;
Vf is the final vertical velocity
Vh is the velocity of the ball at maximum height = 0
t is time to reach maximum height
Vf = 0 + 1.11 x 9.8
Vf = 10.88 m/s
The velocity of the ball in component vector form is written as:
Vf = (Vxf + Vyf), m/s
Vf = (14.38 i + 10.88 j), m/s
The range of the ball is calculated as;
Range = (V²sin2θ)/g
Range = 31.78 m
Therefore the assumption that have been made about the frame of reference is that it was projected from a ground level and returned to the same ground level.
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radio telescopes are generally than visible-light telescopes. much more expensive much smaller much larger located at much higher altitudes
Generally speaking, radio telescopes are much larger than visible-light telescopes.
What is a telescope?Astronomers use a telescope to observe distant things. Curved mirrors are used by the majority of telescopes, including all large telescopes, to collect and concentrate light as from night sky. To focus light, the first telescopes used lenses, which are just twisted pieces of clear glass.
What are the telescopes used for?The light emitted by distant objects is collected and magnified using telescopes. Observing things with in night sky presents challenges since they are far out and, as a result, appear so dim. We can perceive these things more clearly the more light a telescope can gather.
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A box of mass m slides down a frictionless inclined plane of length L and vertical height h. What is the change in its gravitational potential energy?
A. -mgL
B. -mgh
C. -mgL/h
D. -mgh/L
The change in its gravitational potential energy is -mgh and Gravitational potential energy depends on the reference level.
The gravitational force is of course vertically downwards F = mg . To raise a mass m, we must apply an upward force −F, balancing gravity, so the net force on the body is zero and it can move upwards at a steady speed (ignoring air resistance, of course, and assuming we gave it a tiny extra push to get it going).
Applying the steady force −F as the mass moves a small distance takes work − F.Δr , and to raise the mass m through a height h takes work mgh. This energy is stored and then, when the object falls, released as kinetic energy. For this reason it is called potential energy, being “potential kinetic energy”.
That depends on how far we will allow the raised object to fall and convert its potential energy to kinetic energy—but the main point is it doesn’t matter where the zero is set, the quantity of physical interest is always a difference of potential energies between two heights—that’s how much kinetic energy is released when it falls from one height to the other.
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Unbalanced forces have no change in motion and ______ equal zero
just need the answer that fills the blank space plsss
Answer
due to balanced forces, an object in motion cannot change its direction or speed, and also the net forces act a zero in balanced forces.
Explanation:
Unbalanced forces have a change in motion and they have a resultant force in a direction. Whereas, a balanced force does not change in direction and the resultant force is zero.
What is force?Force is an external agent acting on a body to make it changed in its state of motion or rest or to deform it. There are various kinds of forces such as magnetic force, nuclear force, gravitational force, frictional force etc.
If there are two or more forces acting on a body from the same direction, then the net force will be the sum of all the forces. If the two forces are equal in magnitude and if act from the opposite directions they will cancel each other and will not make a displacement. Such forces are called balanced forces.
The imbalance in force on a body is made by the change in direction or in magnitude of the forces. Then there will be a net force and will make the body a change in its motion.
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In an insulated vessel, a quantity of hot water at temperature T1 is mixed with a different quantity of cold water at temperature T2. After equilibrium is established, the vessel contains __________.
water only
An insulated vessel containing a quantity of hot water at temperature T₁ mixed with different amounts of cold water at temperature T₂, After equilibrium is established the vessel contains water at a mixture temperature between T₁ and T₂.
What is thermal equilibrium?Thermal equilibrium is a state reached by two (or more) systems characterized by limited coordinate values of the systems after the systems interact with each other through the diathermic wall.
When hot water and cold water are mixed, heat will flow from hot water (higher temperature) to cold water (lower temperature). In other words, hot water "gives" heat to cold water or cold water "receives" heat from hot water.
The direction of heat transfer is from an object or place with a higher temperature to a place with a lower temperature. Temperature transfer occurs until temperature equality is achieved between the two objects.
Hot water has a higher temperature than cold water, so heat moves from hot water which provides heat, to cold water which absorbs heat.
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PLEASE HELP. STUCK WITH PART C. WILL GIVE BRAINLIEST.
A 30uF capacitor holds a charge of 12 x 10 ^-4 C.
a. What is the voltage that it is charged to?
b. If the tolerance of the capacitor is ± 5uF, express this uncertainty as a percentage.
c. What is the greatest voltage which could occur across the plates of the capacitor?
Answer:the capacitance in farads, is the charge stored on the plates in coulombs, and is the potential difference (or voltage) between the plates.
Explanation:your welcome
a student performs a standard two-slit interference experiment, and the interference pattern is projected on a screen. using a light sensor, the intensity of the pattern is measured, and a plot of intensity versus position is created.
The intensity of the pattern is measured, and a plot of intensity versus position is A) - 40 cm , + 40 cm , - 10 cm , 0.0 cm , + 30 cm , - 30 cm
A) - 40 cm , + 40 cm , - 10 cm , 0.0 cm , + 30 cm , - 30 cm
B) - 5cm, +5cm, -15cm, +15cm, -25cm, +25cm, -35cm, +35cm, -45cm, + 45cm
C) 0.0 cm
D) -40 cm, + 40cm
E) -25cm, + 25cm.
Intensity is the amount of energy a wave transports in one unit of area per unit of time and is also equal to the energy density multiplied by the wave velocity. Usually measured in watts per square meter. Intensity depends on wave strength and amplitude.
Wave strength is defined as the speed at which a wave transfers energy divided by the area over which the energy travels. In other words, intensity is the rate of energy flow per unit area. The term intensity is used to describe the speed at which light travels across a given area of the surface at some distance from the light source.
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PLEASE HELP? The mass on the spring in this diagram is in harmonic motion between x=-5cm and x=5cm. At what point does the mass have the most kinetic energy?
The point where the mass have the most kinetic energy is point zero (0).
option C is the correct answer.
What is kinetic energy?The kinetic energy of an object is the energy possessed by the object due to its motion.
Mathematically, the formula for kinetic energy of an object is given as;
K.E = ¹/₂mv²
where;
m is the mass of the objectv is the speed of the objectIn a simple harmonic motion, the kinetic energy of the object increases as the speed of the object increases.
At maximum displacement of an object under going simple harmonic motion, the potential energy of the object is maximum while the kinetic energy is zero.
At minimum displacement or half of the maximum displacement, the kinetic energy of the object is maximum while the potential energy of the object is zero.
(-5)-------------------0-----------------------(+5)
Kinetic energy energy of the object at the various positions;
-5 is maximum displacement, hence kinetic energy is zero0 is the minimum displacement or half of the two maximum displacement; hence kinetic energy is maximum5 is maximum displacement, hence kinetic energy is zeroThus, option C is the correct answer because position zero (0) is the half or center of the two maximum displacement positions.
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An object is accelerating at a rate of 8m/s^2 when it suddenly has a mass decreased by a factor of 4
Answer:
acceleration = 16 m/s²
Explanation:
According to Newton's second law of motion, acceleration of an object is directly proportional to the net force acting on it keeping the mass of the object constant.
Mathematically,
F ∝ a
It means that When there is no net force acting on the body, there is no acceleration. A force is a push or a pull, and the net force ΣF is the total force, or sum of the forces exerted on an object in all directions. When the net force is increased or decreased by a factor of X, then acceleration also increased or decreased by a factor of X respectively according to Newton's 2nd law of motion. In our case, net force increased by a factor of 2, So acceleration must also increased by a factor of 2.
F = ma
F = 8m N
2F = 16m N
So,
acceleration = 16 m/s²
Where does geothermal energy come from?
CHOOSE FROM THE FOLLOWING:
1. Energy directly from the sun
2. Energy from plants that used sunlight
3. Energy from the effect of the sun on the air and water
4. Energy is not originally from the sun
Answer:4.ENERGY IS NOT ORIGINALLY FROM THE SUN
Explanation: GEO -EARTH,THERMAL-HEAT
Geothermal energy is heat that is generated within the earth .it is a renewable resource. most of the earths geothermal energy does not bubbl e out as water or stream.
Part A In the figure, a conducting rod is shown moving in a uniform magnetic field. Which of the following statements are true? X X X X X Check all that apply. O The magnitude of the potential difference in the rod is inversely proportional to the length of the rod. O The magnitude of the potential difference in the rod is proportional to the velocity vof the rod. O The magnitude of the potential difference in the rod is proportional to the strength of the magnetic field. O The free charges in the rod are acted upon by a magnetic force. O An electric field is established in the rod directed from point a to point b.
An electric field is established in the rod directed from point a to point b and The free charges in the rod are acted upon by a magnetic force.
How does a magnetic field work?While opposed poles are pulled to one another, like poles repel one another. When the air is pushed against a magnet, the atoms' north-seeking poles align in the same direction. The force generated by the aligned atoms creates a magnetic field.
Why is a magnetic field necessary?The magnetic field, produced by the whirling of molten material in the Earth's core, protects our planet from solar radiation and energetic particles from the Sun. Additionally, it provides the structure for compass navigation. When the magnetization surrounds a magnet or perhaps a line carrying a steady electrical charge in a single path, it is referred to with a static electrical field and is stationary.
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When a student is applying a rightward force of 6.5 N to a 1.80 kg box the box remains at rest. When the student applies a slightly larger force, the box moves to the right. Find the coefficient of static friction.
The coefficient of static friction is equal to 0.368.
What is static friction?Static Friction can be described as friction that is experienced when an object is placed on a surface. Kinetic friction can be described as friction due to the movement of an object on a surface. The coefficient of static friction is a scalar parameter and is represented as μs.
The coefficient of static friction can be calculated from the following expression as:
[tex]{\displaystyle \mu_s ={\frac{ F}{mg}[/tex]
Given, the force acting on the box = 6.5 N
The mass of the box, m = 1.80 Kg
The gravitational acceleration, g = 9.8m/s²
The coefficient of static fraction = 6.5/(1.80 ×9.8) = 0.368
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A coil with a self-induction coefficient of 0.1Hi and an ohmic resistance of 51 ohms is connected to an AC voltage source of 240 V and a frequency of 50 Hz. What is the effective current flowing through the coil?
The effective current flowing through the coil is 53.1°.
What is current?Current is the rate of flow of electrons in a conductor. Current, any movement of charge carriers. B. Subatomic charged particles (z is understood to be a positive particle).
Current in a wire where the charge carriers are electrons is a measure of the amount of charge that passes through any point on the wire per unit time. In alternating current, the charge movement is periodically reversed. Not so with direct current. The direction of current flow in electrical circuits is often taken to be the direction of positive charge flow, which is opposite to the actual electron drift. A current defined in this way is called a conventional current.
As per the question the
Inductance =0.1H
Series of placed across=200v
AC=50HZ
We have to find the current in the circuit and phase angle between current and voltage.
XL=WL
= 2×3×50×0.1
XL= 30 ohm
Z= √R²+(Xc-Xl)²
√(12)²+(30-14)² = 20
(i) l=Eu/z
=200/20
=10 A
Tan = 30-14/2
Tan = 1.33
= Tan⁻¹(1.33)
=53.1° C
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Investigators have created structures consisting of linear chains of ionized atoms on a smooth surface. Electrons are restricted to travel along the chain. The energy levels of the electrons match the results of the particle-in-a-box model. For a 5.0-nm-long chain, what are the energies (in eV) of the f" three states?
The energy of electrons of three states are 15.06 meV, 60.24 meV and 0.54 eV
Different orbits in which electrons are revolving are called energy levels or stationary states. These energy/ stationar state levels for an electron are given as n= 1, 2, 3….. .These numbers are called the principal quantum numbers.
The energy of the levels for the electron in the box with length 5 nm is:
[tex]E_{n[/tex] = [tex]h^{2}[/tex]×[tex]n^{2}[/tex]/ 8 m [tex]L^{2}[/tex]
=6.626×[tex]10^{-34[/tex] j[tex]s^{-1[/tex]/8 ( 9.11×[tex]10^{-31[/tex] kg )×([tex](5.10^{-9[/tex] )2 ×[tex]n^{2}[/tex]
= 2.41 ×[tex]2.41^{-21[/tex] j [tex]n^{2}[/tex]
= 15.06 me V[tex]n^{2}[/tex]
The energies of the first three states are:
E1 =15.06 meV
E2 = 60.24 meV
E3 = 0.54 eV
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Specify the SI unit for the penetration coefficient of ultrasonic waves:
m-1
m/s
non-dimensional quantity
The penetration coefficient of ultrasonic waves be non-dimensional quantity. So, this has no unit.
What is penetration depth?The depth to which light or any other electromagnetic radiation may permeate a material is known as the penetration depth. It is defined as the depth at which the radiation's internal intensity reaches 1/e (or, more precisely, just below) its initial value at (or just below) the surface.
The atoms and electrons inside the substance interact with this electromagnetic field. The electromagnetic field may penetrate a material very deeply or may disappear very fast, depending on the nature of the material. The depth of penetration for a given substance is typically a function of wavelength. So, the penetration coefficient of ultrasonic waves: non-dimensional quantity. So, this has no unit.
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In the circuit below, identify how the resistors are connected and then identify the quantity that must always be the same for these resistors.
In the circuit below, the resistors are connected in the series combination and the battery is parallel to the resistor.
What is circuit?Circuit is defined as a closed circuit or route that connects electrical parts and permits the movement of electrons. The term "circuit" can broadly be used to describe any ongoing path via which electricity, data, or a signal might go.
The current flowing through each resistor when two resistors are linked in series is the same. The two resistors divide the voltage from the battery. More resistors in a series circuit increase total resistance, which reduces current.
Thus, in the circuit below, the resistors are connected in the series combination and the battery is parallel to the resistor.
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A body of mass 1 kg has weight 10N at a certain place. What is the weight of 100g,
Hello,
I hope you and your family are doing well!
The weight of an object is the force exerted on the object due to gravity, and it is calculated as the mass of the object multiplied by the acceleration due to gravity. In this case, we are given that the weight of a 1 kg mass is 10 N at a certain place, which means that the acceleration due to gravity at that place is 10 N/kg.
If we want to find the weight of a 100 g mass at that place, we can use the same equation:
Weight = Mass * Acceleration due to gravity
In this case, the mass is 100 g, which is equivalent to 0.1 kg. Therefore, the weight of the 100 g mass is:
Weight = (0.1 kg) * (10 N/kg)
= 1 N
Thus, the weight of a 100 g mass at the given place is 1 N.
--
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What can you do to cause acceleration (positive or negative acceleration) in the objects in your table?
Answer: Acceleration is positive when a body speeds up and is negative when the body slows down.
Explanation: please don't hate me this is just my own opinion
True or False: because the poles of uranus spend 42 years in darkness, the temperatures between the northern and southern hemispheres of uranus differ by as much as hundreds of kelvins, depending on where uranus is in its orbit.
The statement that states because the poles of Uranus spend 42 years in darkness, the temperatures between the northern and southern hemispheres of Uranus differ by as much as hundreds of kelvins, depending on where Uranus is in its orbit is false.
Why does Uranus have 42 years of daylight?
Uranus is notable for its massive 98-degree tilt on its axis. It is essentially lying on its side, with the poles receiving direct sunshine. Extreme seasons result, and when the Sun rises at one of the poles, that pole receives direct sunlight for 42 years.
What is the temperature of Uranus?
The temperature of Uranus averages minus 320 degrees Fahrenheit (-195 degrees Celsius), according to NASA. Uranus holds the record for the coldest temperature ever measured in the solar system — minus 371.56 degrees F.
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A compact car has a maximum acceleration of 5.0 m/s2 when it carries only the driver and has a total mass of 1300 kg .What is its maximum acceleration after picking up four passengers and their luggage, adding an additional 400 kg of mass?
3.82 m/sec² is its maximum acceleration after picking up four passengers and their luggage, adding an additional 400 kg of mass.
What is a acceleration explain?The rate during which speed and the direction and velocity change over time is referred to as acceleration. When something accelerates or decelerates, it rushes toward something that is moving straight ahead.
Briefing:F = m . a ;
(F - Force; m - mass and a - acceleration);
given in the problem; mass (1) - 1300 kg; acceleration (1) - 5 m/sec²
So, on substituting we get,
F = m1a1 = 1300 X 5 = 6500 N;
we get
F = 6500 N
Now that mass 400 kg has been added, mass (2) equals 6500 kg, and acceleration must be determined;
Since the force is constant in this case, it can be compared;
m[tex]_1[/tex]a[tex]_1[/tex] = m[tex]_2[/tex]a[tex]_2[/tex] ;
So, 1300 X 5 = (1300 + 400) x a[tex]_2[/tex]
Therefore, the answer will be a[tex]_2[/tex]= 3.82 m/sec²
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In this circuit, the following values apply:
What is the current (in Amps) through R4?
In this circuit, the current (in Amperes) flowing through the resistor 4 , that is, R4 is 10 Ampere.
Explain what is ampere.
Ampere is named after the French Physicist and Mathematician Andre-Marie Ampere. One ampere of current represents one coulomb of electrical charge, i.e. 6.24×1018 charge carriers, moving in one second. In other words, “an ampere is the amount of current produced by the force of one volt acting through a resistance of one ohm”.An ampere is an electrical current that is equal to 1019 elementary charges moving every 1.602176634 seconds or 6.2415090741018 elementary charges moving in a second, as of the 2019 redefinition of the SI base units. This definition was achieved by fixing the elementary charge e to be exactly 1.6021766341019 C (coulomb), which means an ampere is an electrical current.
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The density of water in a lake is 1000 kg/m³
At a depth of 25m beneath the surface of the lake, the total pressure is 3.5×10⁵ Pa
(a) State what is meant by pressure.
(b) The gravitational field strength is 10 N/kg
. Determine:
(i) the pressure due to 25m of water
pressure =
(ii) the atmospheric pressure=____
atmospheric pressure =_____
(i) The pressure due to 25m of water is 250,000 Pa.
(ii) The atmospheric pressure is 100,000 Pa.
What is pressure?
Pressure can be defined as the force per unit area of an object.
Mathematically, the formula for pressure of an object is derived as;
P = F/A
where;
F is the applied force on the objectA is the area of the objectP = (mg) / (V/h)
P = (mgh) / V
P = (m/V)gh
where;
m is massV is volume of the objectg is acceleration due to gravityh is height or depthDensity of an object or a substance is known as mass per unit volume of the substance.
P = (ρ)gh
where;
ρ is the densityThe pressure due to 25m of water is calculated as follows;
pressure = (ρ)gh
pressure = 1000 kg/m³ x 10 N/kg x 25 m
pressure = 250,000 Pa
The atmospheric pressure is calculated as;
P(atm) = P(total) - P(water)
P(atm) = 350,000 Pa - 250,000 Pa
P(atm) = 100,000 Pa
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