The work done by Joe is 0J in balancing a stationary coin 2 m from the top of the floor.
The work is done when an object is raised to a height against gravity. Work done depends on force and displacement caused by that force.
W = F. S
Where,
W = work done
F = Force and,
S = displacement caused in an object in the direction of the force.
Since the object has not been raised against gravity, there is no force against which work has been done.
F = 0 N, S = 2 m
W = 0× 2 J
= 0 J
The work done is 0J
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What happens to the ball when you put a backspin on the ball and the opponent hits it forward with a neutral or flat angle? -A. It returns with a topspin
B. It goes into the net
Or c:It flies high to the back of the table.
Answer: tbh I think it’s C I did research and says similar about it
Explanation:
If there is no dark matter in the milky way galaxy, what is the best alternative explanation for the observations?.
Answer:
My own understanding of gravity is not correct for galaxy-size scales.
the diagram below shows a segment of DNA before and after erplication, which of the following could have occured as a result of this change in structure?
The change or mutation in a segment of DNA after replication may lead to changes in the genotype, the traits of the organism and the proteins (option i, ii and iii).
What is a genetic mutation?A genetic mutation is any change in the nucleotide bases of the genome of an organism that may be associated with modifications in the phenotypic traits or features of the organism if this change alters the expression of a given gene that produces a particular protein.
Mutations may be neutral when they don't show an apparent effect on the phenotype of an organism such as occur in mutations located in intergenic regions.
Therefore, with this data, we can see that a genetic mutation may alter the proteins produced by an organism which has a direct effect on the phenotype by altering the structures that it is able to synthesize.
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What happens when the pressure of a gas over solvent increases?
A.Less gas will dissolve in the solvent.
B. Less solvent will escape as a gas.
C. More solvent will escape as a gas.
D. More gas will dissolve in the solvent.
Answer:
D
Explanation:
More pressure pushes more gas into the solvent
think about the opposite when you open a soda and decrease the pressure....the gas comes out of solution....
an electron is accelerated toward a target. find the minimum accelerating potential difference (magnitude) that would
The minimum accelerating potential difference (magnitude) that would be required will be 62 kV.
Can electrons be accelerated?Charged particles, such protons or electrons, are accelerated by particle accelerators to almost the speed of light. They then strike a target or additional particles with those fragments. According to Albert Einstein's special theory of relativity, the relativity of time prevents electrons from going faster than the speed of light when deciding whether they can do so.
How to solve the given question?Given, wavelength (λ) = 0.0220 nm = 0.22×10∧-10 m = 0.22 A°
λ = hc/eV
V = 12400/λ
V = 12400/0.22
V = 62000 V
V = 62 kV
The minimum accelerating potential difference (magnitude) that would be required to produce kV will be 62 kV.
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The complete question is,
An electron is accelerated toward a target. Find the minimum accelerating potential difference (magnitude) that would be required to produce kV. Assume the electron is initially at rest before accelerating toward the target.) wavelength of 0.0220 nm when the electron strikes the target. (Enter your answer in an x-ray with a kV.
one important way astronomers can learn in some detail about what happens when galaxies collide is
One important way astronomers can learn in some detail about what happens when galaxies collide is to simulate galaxy collisions on a large computer and watch what the simulation predicts.
Simulating galaxy collisions on a large computer allows astronomers to observe how galaxies interact and evolve when they collide.
What can astronomers observe when galaxies collide?They can observe how stars, dust, and gas interact, how the shape of the galaxies change, how the distribution of stars changes, and how the total mass of the galaxies is affected.
They can also observe how the collision affects the gas and dust, and how they form new stars, as well as how subsequent collisions can cause the galaxies to merge completely. Simulations provide a powerful tool to gain insight into the complexities of galaxy collisions and to understand how galaxies form, evolve, and interact.
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5 benefits of muscular strength training
Answer:
1/ Better Health
2/ Reduce injury posibility
3/ Increase energy level when exercising
4/ Bigger muscle
5/ Prevent disease
Explanation: The training helps you get the five benefits above. There is more benefit, but I think the five above are the most important!
A scientific law is something we can use to make a specific, concrete prediction. For example, the law of gravitation states that masses will attract each other, and you will find that this is always the case. However, it can also be used to make concrete statements about the properties of an object in the right conditions. For example, if a material were found that was not attracted to other objects with masses, we could say that.
A scientific law is something we can use to make a specific, concrete prediction. For example, the law of gravitation states that masses will attract each other, and you will find that this is always the case. However, it can also be used to make concrete statements about the properties of an object in the right conditions. For example, if a material were found that was not attracted to other objects with masses, we could say that the material has no mass (Option B).
What is a scientific law?A scientific law is a well sustained statement or model based on diverse hypotheses that were tested by using the scientific method, which additionally allows us to make predictions about certain questions raised by observing the natural world.
Scientific laws are based on experimentla and observational procedures that can be used to test all statements of the laws and thus also verified in their assumptions.
Therefore, with this data, we can see that scientific law is based on several well sustained assumptions that were tested by using the scientific method and thus conformed to make predictions about certain outcomes
Complete question:
Choose the right option. A scientific law is something we can use to make a specific, concrete prediction. For example, the law of gravitation states that masses will attract each other, and you will find that this is always the case. However, it can also be used to make concrete statements about the properties of an object in the right conditions. For example, if a material were found that was not attracted to other objects with masses, we could say that____
the material is charged.
the material has no mass.
the material must be floating.
the material has very little mass.
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the axis on which earth now rotates is tilted at an angle. if the axis was to be changed so that it was perfectly upright, which change would be expected on earth?
There wouldn't be any light and dark phases if the axis were adjusted so that it was absolutely upright. Since winter will usually prevail in the Southern Hemisphere, this alteration would not be unexpected on Earth.
What is an angle?In planar geometry, an angle is a shape made up of two rays or lines that share an endpoint. The common terminal of two rays is known as the vertex, and the two rays are referred to as sides of an angle. The Latin word "angulus," which means "corner," is the basis of the English name "angle." In Euclidean geometry, an angle is a shape composed of two rays, referred to as the angle's sides and vertices, respectively, and having a common terminus. Two rays can form angles in the plane where they are positioned.
What is the measure of an angle ?One can measure and calculate angles in terms of degrees with a protractor. The black arrow in the figure below, for instance, uses a protractor to point to 100°, crossing 90°. Consequently, the angle has a size of 100°.
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calculate the refractive index of an optical medium if light travels inside the medium at 2.5 x 10^8 m/s inside the medium.
If light moves through an optical medium at a speed of 2.5 x 108 m/s, the media's refractive index is 1.2.
The material's refractive index (n) may be defined as -
Refractive Index (n) = Light's speed in a vacuum (C) divided by its light speed in a medium (V)
Therefore, n = C/V
Given that the speed of light in the medium is V=2.5×10⁻⁸m/s
and the speed of light in the vacuum is C=3.0×10⁻⁸m/s
Therefore, the equation gives us n = C/V
n=3.0×10⁻⁸m/s÷2.5×10⁻⁸m/s,
which equals n=1.2 (Refractive index of the medium).
Refractive index: The refractive index, sometimes called the refraction index in optics, is a dimensionless quantity that describes how efficiently an optical material bends light.
Light: light is the organic substance that activates vision and makes things visible
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As altitude increases, the air pressure decreases. How do you think the lower pressure will affect the following?.
Answer:
A. Freezing point: Increase.
B. Melting point: Decrease
C. Boiling point: Decrease
Explanation:
As we go up in higher altitudes the air becomes on and less dense, hence the decrease in the water vapor content at such altitude leads to a decrease of boiling point.
Thus the air above is cool and much colder than at the ground surface. The vapor pressure is temperature-dependent and thus the melting point will decrease.
Which statement correctly describes the differences between positive and negative acceleration?
A. Positive acceleration describes a change in speed; negative acceleration describes no change in speed.
B. Positive acceleration describes no change in speed; negative acceleration describes a change in speed.
C. Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.
D.Positive acceleration describes a decrease in speed; negative acceleration describes an increase in speed.
Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed. Hence option C is correct.
What is acceleration?Acceleration is defined as the speed at which an object's velocity changes over time. It is a vector quantity to accelerate. If a point or object travelling straight forward accelerates or decelerates, it is moving faster or slower. The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t).
When the car accelerates positively, its speed rises. As the car slows down, its speed decreases. Negative acceleration occurs when a force causes a body's velocity to decrease. Therefore, the body's negative acceleration can also be referred to as its deceleration.
Thus, positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed. Hence option C is correct.
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Radio waves travel at a speed of 300,000,000 m/s. WFNX broadcasts radio waves at a frequency of 101,700,000 Hz. What is the wavelength of WFNX’z radio waves?
The wavelength of WFNX’s radio waves with the given speed and frequency is 2.95m.
What is wavelentgh?Wavelength can be defined as the distance between two successive crests or throughs of a wave.
The wavelength of WFNX’s radio waves with the given speed and frequency is 2.95m.
Given data in the question;
Speed of wave; c= 3×10^8
Frequency of wave; 1.017×10^8
wavelength; ?
To determine the wavelength of the radio wave, we use the expression for the relations between wavelength, frequency and speed.
C\f
Where is wavelength, f is frequency and c is the speed.
We substitute our given values into the equation
=2.95
Therefore, the wavelength of WFNX’s radio waves with the given speed and frequency is 2.95m.
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7) Calculate the KE. of a a) 2 kg trolley travelling at 1.5 m/s,
Answer:
Explanation:
KE=mv(v)/2
KE=2(1.5)(1,5)/2
KE=2.25
Important Formulas:
[tex]KE=.5mv^2[/tex]
__________________________________________________________
[tex]m=2kg[/tex] (measured in kg)
[tex]v=1.5m/s[/tex] (measured in meter per second)
[tex]KE=?[/tex] (measured in joules)
__________________________________________________________
[tex]KE=.5(2)(1.5)^2[/tex]
[tex]\fbox{KE = 2.25J}[/tex]
Jupiter, the largest planet in the solar system, has a mass 318 times that of Earth
and a volume that is 1323 times greater than Earth's. Calculate the magnitude of
the gravitational force exerted on a 50. 0 kg mass on Jupiter's surface.
The gravitational force exerted on a 50 kg mass on Jupiter's surface is 1.30×[tex]10^{3[/tex] N. Acceleration due to gravity on Jupiter is 2.23 times that of the earth.
Gravitational force is due to mass in an object. This is an attractional force with which all objects are attracting each other. All heavenly bodies have great mass. They attract each other and also if an object is reaching in their gravitational pull.
Force of gravity is calculated using the formula
F = G m1. m2/ [tex]r^{2}[/tex]
We are given mass of Jupiter and radius in terms of earth mass and radius.
volume of earth = 4/3 π[tex]r^{3[/tex]
Volume of Jupiter= 1323 × volume of earth
4/3 π[tex]R^{3[/tex] = 4/3 π[tex]r^{3[/tex] × 1323
R = r [tex]\sqrt[3]{1323}[/tex] =10.97 r
So, Gravity force on Jupiter = G 50 × 318 M/10.97 ×10.97[tex]r^{2}[/tex]
= 50 ×5.97×[tex]10^{24[/tex]÷ 10.97×10.97×6.37×[tex]10^{6[/tex]
after calculation we get the value 1.30×[tex]10^{3[/tex] N
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14) Calculate the magnitude and direction of the magnetic force on a particle of charge q= 13C that
is moving with a velocity of v= -20m/s x (to the left) in a magnetic field of B= 0.5 T 2
The magnitude and direction of the magnetic force on a particle of charge is - 2.21 in the opposite direction.
What is magnetic force?Magnetic force is defined as the electrically charged particles that are in motion and exhibit either attraction or repulsion. The interaction between moving and stationary charged particles is explained by the electromagnetic force, commonly known as the Lorentz force.
The magnitude and direction of the magnetic force can be calculated as
F = q v B sinθ
Given q = 13 C
v = - 20 m/s
B = 0.5 T²
F = 13 C x - 20 m/s x 0.5 T² sinθ
F = - 130 sinθ
Let θ is equal to 1
Then, F = 130 sin1
F = - 130 x 0.017
F = - 2.21
Thus, the magnitude and direction of the magnetic force on a particle of charge is - 2.21 in the opposite direction.
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A horse pulls on a carriage. By newton's third law, the carriage pulls back on the horse with equal force. Why do the action and reaction forces just described not balance each other out?.
The reason behind action and reaction forces not balance each other out is d)because the action force acts on the carriage, while the reaction force acts on the horse. So, correct option is d.
Forces generally act two by two, which are known as activity and response forces.
The activity force is the power applied to an article by the first activity, and the response force is an equivalent power applied by the item the other way.
A power that is applied to an item is alluded to as an activity force. A response force is the consequence of an inverse heading activity force.
Newton's third law of motion tends to these two forces, alluded to as activity and response powers.
The depicted activity and response powers don't adjust each other out in light of the fact that the activity force follows up on the carriage and the response force follows up on the pony.
Hence, correct option is d.
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(Complete question) is:
A horse pulls on a carriage. By Newton's third law, the carriage pulls back on the horse with equal force. Why do the action and reaction forces just described not balance each other out?
A.
because this is not an action--reaction pair
B.
because action and reaction forces are not equal in magnitude in this case
C.
because action and reaction forces act in the same direction in this case
D.
because the action force acts on the carriage, while the reaction force acts on the horse
A large, moving truck crashes into a small parked car. How do the magnitudes of the impulses and theforces on each vehicle compare during the collision?
A. The truck experiences less force and less impulse.
B. The truck experiences equal force and equal impulse.
C. The truck experiences less force but more impulse.
D. The truck experiences more force but less impulse.
A large, moving truck crashes into a small parked car. How do the magnitudes of the impulses and the forces on each vehicle compare during the collision: A The truck receives more force but less impulse.
In physics, value is defined really as “distance or amount.” It depicts absolutely the relative course or length wherein an item actions within the experience of movement. it's far used to specify the scale or scope of something. In physics, value commonly refers to distance or quantity.
Magnitudes are the scale of something. for example, in the case of speed, a vehicle is moving faster than a bike. in this instance, the importance of the speed of the auto is higher than that of the bike. It tells the route or size that is absolute or relative in which an item travels in the experience of motion.
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in diamond, by how much, in degrees, do the critical angles for total internal reflection differ for red light compared to violet light?
The critical angles for red and violet light through diamond are 24.5° and 24.0°, respectively.
What is a critical angle, exactly?The incidence on incidence at which the refraction angles equals 90 degrees is known as that of the critical angle. The polarization di incident light and the light beam bends in the direction of normal when it enters a thicker environment from a similarly rarer medium.
An illustration of a critical angle.The critical angle is the angle of impact that provides a 90-degree angle of refraction. Keep in mind that an angle of impact value is how the angle of inclination is defined. For water-air borders and crown glass-water borders, the angle of inclination would be 48.6 degrees and 61.0 degrees, respectively.
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does the pivot point (i.e., the triangle in the diagram upon which the ruler balances) exert a force on the ruler? does it exert a nonzero torque about the pivot?
Yes, the pivot point (i.e., the triangle in the diagram upon which the ruler balances) exert a force on the ruler. No, it does not exert a nonzero torque about the pivot.
What is meant by a pivot point?Pivot point is that point where an object rotates around. Sometimes, it is called the fulcrum or rotational axis.
A lever has a rigid bar that is able to pivot at one point and this point of rotation is known as the fulcrum. Force is applied at some point away from the fulcrum.
Torque is a measure of how much force acting on the object causes that object to rotate. The object rotates about an axis, which is called as the pivot point.
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6. In 1874, a swarm of locusts descended on Nebraska. The swarm's mass was estimated to be 25 × 10⁹ kg. If this swarm were split in half and the halves separated by 1.0 × 10³ km, what would the magnitude of the gravitational force between the halves be?
The change in gravitational potential energy stored in 16 Jule.
What is gravitational potential energy?Gravitational potential
In classical mechanics, of the gravitational potential at in a location is equal to the work per unit mass that's would be needed to Move an object to that locations from a fixed references location. It is analogous to the electric potential with the mass playing the role of charge.
Sol-As per the given question ∆PE = mgh
M= skg
g= 4m/s^2
∆h = 2m
∆PE = 2m×4m×2m
= 16 Joules.
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when a tandem axle truck is equipped with a 6s/4m split configuration, how are the brakes on the drive axles modulated during abs braking?
Each of the vehicle's six wheels would have a wheel speed sensor, but there would only be four modulators in the six-in/four-out system.
What does an ABS brake do?Anti-lock braking systems (ABS) help you manoeuvre in an emergency by restoring traction to your tyres. What It Does: Assists in stopping wheel locking so that the driver may steer to safety. What It Isn't Able To Do The stopping distance might not be lowered, and it's okay if the pedal wobbles or pushes back.
Does ABS affect braking and its disadvantages?By keeping the brakes from locking, ABS gives the driver better steering control while braking. ABS rarely activates, unless you reside in a state with lots of snow and ice. It groans and rattles when it does. Many motorists claim that they feel as though their brakes had failed.
The main drawback of ABS brakes is the additional expense that it adds to the base price of a vehicle. Additionally, maintenance expenses increase since each wheel's pricey sensors might be expensive to replace if they become out of calibration. Anti-lock brakes' primary function is to offer sure-footed braking.
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sound components are identified as coming from the same sound source. this means that the components are
Sound components are identified as coming from the same sound source. this means that the components are generated by the same physical object or process, and they tend to have similar characteristics such as frequency, timbre, and intensity.
What is Sound components about?These components are usually perceived as being part of a single sound or voice, rather than being perceived as separate sounds.
For example, if you are listening to a person speaking, the different sound components that make up their voice, such as their pitch, vowel sounds, and consonant sounds, are all generated by the same source (the person's vocal cords and mouth).
In some cases, sound components can be isolated and analyzed individually. For example, in audio engineering or music production, in order to shape the overall sound of a recording or performance.
Additionally, sound components can be synthesized or manipulated using digital audio software, allowing for the creation of new sounds or the modification of existing ones.
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consider a long straight 1.70-amp current. what is the magnetic field strength, in microteslas, at a distance of 15.0 cm from the current?
At a distance of 15 cm, the magnetic field strength (measured in microteslas) is 0.68 T.
What is magnetic field?A magnetic field, a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. The magnetic field is the area in which a magnet produces its magnetic effects. We use the magnetic field as a tool to describe how the magnetic force is distributed in the vicinity and inside something magnetic in nature.
What causes a magnetic field and where it is find?Magnetism is created by moving electric charges. The tiniest units of matter are known as atoms. Each atom contains charged particles called electrons. The nucleus, or core, of an atom is made up of electrons that spin like tops.
The Earth's magnetic field (and surface magnetic field) has two poles, one close to the planet's geographic north pole (see Magnetic North Pole) and the other close to its geographic south pole. Together, these poles resemble a magnetic dipole (see Magnetic South Pole).
Briefing:Formula to calculate magnetic field around a wire:
B=(μ_° I)/2πd
B = The strength of magnetic field (Tesla)
μ₀ = permeability of free space = 4π × 10⁻⁷ T/mA
I = the current (Ampere)
π = 3.14
d = distance from the wire (m)
Given
I = 1.70 A
D=15.0 cm
B=(μ_° I)/2πd
B=(4π × 10⁻⁷×1.70)/2πd
B=(2 × 10⁻⁷×1.70)/d
B=(3.4× 10⁻⁷)/15
B=0.68×〖10〗^(-6)
B=0.68μT
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what type of observation can astronomers use to measure the composition of extrasolar planet atmospheres?
The type of observation that astronomers can use to measure the composition of extrasolar planet atmospheres : comparisons of a star's spectrum when planet is in transit versus when it is eclipsed.
What are extrasolar planets?Several planets outside the Solar System called exoplanets have been observed to have atmospheres. At the present , most atmosphere detections are of hot Jupiter or Neptune that orbit very close to their star and therefore have heated and extended atmospheres.
As a transiting extrasolar planet passes in front of its host star, one can observe the exoplanet's atmosphere as it is backlit by the star. Additional atmospheric observations can also be made by watching as exoplanet disappears and reappears from behind the star.
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suppose a planisphere star rises at 8pm (pst) tonight. what time did that same star rise one month ago? g
The vertical impulse by the lift force during this time is 4.15 by minutes for Newton second.
We have a demon That there is a force of 52 down cause of 15. Right? This is what we have you in the questions and acting on the bill. Be both masked by Graham of Mars five g. No. In the meantime. And travelers given that the time and develop acting on this fourth, you should humanists. But we need to find the impulse England's. They seem to not advise you actually. This is what we need to find. So we know that false change in momentum much time. So basically impulses change momentum, but you find impulses changing moment also jay so G is false in campaign so we can put forth here. The forces to do time 59 1 dime. That's Spanish for -5. This was with 15 to 10 days to four minutes, five Newton and two times three seconds Volunteers. They will get 15 into 10 days to the R -4. 15 10 by minus for Newton's second.
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ou know the stall torque and no-load speed of a pm dc motor, what is the maximum power the motor can deliver?
If we know the stall torque and no load speed of a pm dc motor, the maximum power motor can deliver is P max = 1/2* Tstall * 1/2* ω(no load).
A mechanical device that produces stall torque has an output rotational speed of zero. Electric motors are capable of developing torque when stalled.
However, as the current flowing is at its maximum while an electric motor is halted, they are vulnerable to overheating and potential damage.
The no load speed is the speed when running at nominal voltage and zero load.
So, the maximum power motor can deliver is P max = 1/2* Tstall * 1/2* ω(no load).
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a golf ball of mass 0.050 kg is at rest on the tee and has a velocity of 102 m/s immediately after being struck. if the club and ball were in contact for 0.94 ms what is the average force exerted on the ball?
A golf ball with a mass of 0.050 kg is at rest on the tee and accelerates to 102 m/s as soon as it is struck. The average force applied to the ball if the club and ball made contact for 0.94 ms is 6.3 kN.
Describe impulse.Impulse is a term used to describe how a net force—a specific type of "moving force"—affects an object. An impulsive force is a strong force that acts quickly to cause a finite change in momentum. Impulsive forces were conceptualized separated from regular forces throughout science history.
How is impulse calculated in physics?Force times time equals change in momentum for an impulse.
Briefing:F = mv/t
F = (0.050 kg)(102 m/s) / 0.81 ms × 10⁻³ = 6.3 kN
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( this is science but there’s no subject for that so ) Q: Was there work done? Describe the energy in the situation as well.
2. Answer the questions for this block.
3. Answer the questions for this block
The work done by force is negative in the first scenario because the force and displacement are acting in the opposing directions. As the force and displacement are perpendicular in the second condition, there is no work done.
What exactly is a physics "work done"?
The product of a force's component acting in the displacement's vector and its magnitude is known as the work done by the force. Formula. The following formula may be used to calculate work by multiplying force and distance in the direction of the force. Unit: W = F d.
What exactly is a work example?
The following situations include work: relocating a table. a door is pulled and pushed. Walking. raising a stone.
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to sterilize a 50.0-g glass baby bottle, we must raise its temperature from to . how much heat transfer is required?
To sterilise a 50.0-g glass infant bottle, we must increase its heat from 22.0 to 95.0 degrees Celsius, or 3066 J of heat is transferred.
What is heat?Heat is the result of the movement of kinetic energy within a material or an item, or from form of energy to a material or an object. Electromagnetic energy can be transported using three different mechanisms: radiation, conduction, and convection. Conduction of heat through solids, convection of liquids and gases, and electromagnetic radiation (radiation).
What is the heat treatment?When a substance is subjected to a material-specific phase-change temperature, the material immediately undergoes a phase shift from a solid to a liquid. sources include solar energy, heat pumps, deep geothermal heat pumps, nat gas, lpg (LP), oil, coal, and wood.
Briefing:50.0 g (0.84 J/g C) of heat was transported (95 C - 22 C)
= 3066 J of heat transferred
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