In a reference frame fixed to Earth, a point on the equator moves zero distance in 1 hour.
What is the frame of reference?A frame of reference in physics is made up of an abstract coordinate system and the collection of physical reference points that fix the coordinate system specifically and regulate measurements inside it.
When we take a reference frame fixed to Earth, the displacement due to earth's rotation can not be measured. So, any point on earth remains in rest through out the day with respect to the reference frame fixed to Earth. Hence, a point on the equator moves no distance in 1 hour in a reference frame fixed to Earth.
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A plane flies along a straight line path after taking off, and it ends up 190 km farther east and 80.0 km farther north, relative to where it
started. What is the plane's displacement?
O 141 km
O 210 km
O 270 km
O 110 km
1 2 3 4 5 6 7 8 9 10
Next ▸
The plane has a 210km displacement value.
The ideal answer is B.
How far is the plane moving?A plane flies straight after takeoff and ends up 190 km to the east and 800.0 km to the north of where it started.
We should use Pythagoras' Theorem to solve this problem.
Distance 2 is calculated as 190^2 + 80^ = 210 km.
which, when rounded, is equivalent to 210 kilometers.
190^2 + 80.0^2 = 45000
√45000
210KM
The displacement of the plane is 210 kilometers.
An object's positional change is referred to as "displacement." It possesses a magnitude and direction as a vector quantity. It is represented by an arrow that leads from the starting point to the destination. An object's position changes, for example, if it moves from position A to position B.
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The model of the electromagnetic spectrum shows red and violet colors of visible light.
Answer: Dispersion of visible light produces the colors red (R), orange (O), yellow (Y), green (G), blue (B), and violet (V). It is because of this that visible light is sometimes referred to as ROY G. BIV.
Explanation:
In Connecticut, the residential electricity rates increased from 20.75 to 26.64 cents per kilowatt-hour over the last year (Source: Electricity Rates by State).
A family goes on vacation for 14 days but forgets to turn off window air conditioning that uses approximately 1,100 watts of electricity to run. If the cost of electricity is 23.75 cents per kilowatt-hour, how much does it cost to run the window air conditioning? Give the answer in $$ (not cents!)
The cost of running the window air conditioning for 14 days, given that the cost of electricity is 23.75 cents per kilowatt-hour, is $ 87.78
How do I deterrmine the cost for 14 days?We'll begin by obtaing the energy consumed by the window air conditioning for 14 days. This can be obtained as follow:
Power (P) = 1100 watts = 1100 / 1000 = 1.1 KW Time (t) = 14 days = 14 × 24 = 336 hoursEnergy (E) =?E = Pt
E = 1.1 × 336
E = 369.6 KWh
Finally, we shall determine the cost of running the window air conditioning. This is shown below:
Cost per KWh = 23.75 cents = 23.75 / 100 = $ 0.2375Energy (E) = 369.6 KWhCost of running for 14 days =?Cost = energy × Cost per KWh
Cost of running for 14 days = 369.6 × 0.2375
Cost of running for 14 days = $ 87.78
Thus, we can conclude that the cost of running for 14 days is $ 87.78
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A body is thrown downwards with a velocity of 10ms. Assuming the acceleration due to gravity
is 10ms calculate its displacement after 2s?
s(displacement) = 40m , when a body is thrown towards with a velocity of 10ms.
What is velocity?It can be defined as the distance covered by an object in unit time.
What is displacement?Displacement is defined to be the change in position of an object.
What is acceleration?Rate at which velocity changes with time, in terms of both speed and direction.
How to calculate displacement after 2s when initial velocity is 10ms?S = ut + 1/2 at²
where, S = displacement (m)
u = initial velocity (ms)
a = acceleration (g=10m/s²)
t = time (s)
S = 10×2 + 1/2 × 10(2)²
S = 40m
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An object is dropped from an unknown height. If it falls for 12.0s, how far
does it fall? (g = -9.81 m/s²)
O-706 m/s²
O -706 m/s
O -706 m
O-706 s
Question 7
4.1 pts
Answer:
706 m
Explanation:
Since distance is measured in meters (Standard Issued Units) the answer would be 706 m and not any other value.
A body moving with uniformly acceleration A has two point (5,15) and ( 20,60) on the velocity time graph of its motion. Calculate A. Pls I would like if the graph can be drawn I have the workings
Answer:
3 m/s
Explanation:
The slope of a velocity-time graph will give the acceleration for the object over the given interval.
Finding the slope:
[tex]a = \frac{y_2 - y_1}{x_2 - x_1} = \frac{60 - 15}{20 - 5} = \frac{45}{15} = 3\\[/tex]
The acceleration A would be 3 m/s
Shandra is studying Earth's magnetic field in her science class. She leams that a giant shield around her planet protects all living things from dangerous charged particles from the sun.
How does the magnetic field protect life on Earth?
O A. The magnetic field directs charged particles toward the poles and then past Earth.
O B. The magnetic field directs charged particles toward the equator and then past Earth.
O C. The magnetic field absorbs the charged particles coming from the sun.
O D. The magnetic field directs charged particles toward the poles then absorbs them.
The magnetic field protect life on Earth by directing the charged particles toward the poles and then past Earth.
The giant shield around Earth that protects all living things from dangerous charged particles from the sun is called as Earth's magnetosphere. It is generated by the motion of molten iron in Earth's core. It also provides the basis for navigation using a compass.
The magnetosphere shields the life on Earth from the constant bombardment by charged particles emitted from the sun which is called as solar wind.
Therefore, the magnetic field protects life on Earth by directing the charged particles toward the poles and then past Earth.
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A 1.0 kg block is pushed 3.0 m at a constant
velocity up a vertical wall by a constant force
applied at an angle of 28.0
◦ with the horizontal, as shown in the figure.
The acceleration of gravity is 9.81 m/s2
.If the coefficient of kinetic friction between
the block and the wall is 0.30, find
a) the work done by the force on the block.
Answer in units of J.
b) the work done by gravity on the block.
Answer in units of J.
c) the magnitude of the normal force between
the block and the wall.
Answer in units of N.
(a) The work done by the force on the block is 9.99 J.
(b) The work done by gravity on the block is 29.4 J.
(c) The magnitude of the normal force between the block and the wall is 9.8 N.
What is the work done by the applied force on the block?
The work done by the applied force on the block is calculated as follows;
W = Fd cosθ
where;
θ is the angle of inclination of the applied forced is the displacement of the blockF is the applied forceF - μmg = ma
since the block is moving as constant velocity, acceleration = 0
Fcosθ - μmg = 0
F = μmg/cosθ
W = μmgd/cosθ
W = 0.3 x 1 x 9.8 x 3 / cos(28)
W = 9.99 (J)
The work done by gravity on the block is calculated as follows;
W = mg d cosθ
where;
m is mass of the blockW = 1 x 9.8 x 3 x cos(0)
W = 29.4 J
The magnitude of the normal force between the block and the wall is calculated as;
Fn = mg
Fn = 1 x 9.8
Fn = 9.8 N
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What are the smaller bulbs called?
Answer:
E10 Miniature Edison Screw (MES) Also called “Miniature Screw
The smaller light bulbs are the E5 Lilliput Edison Screw (LES).
What are the common light bulb base sizes ?
Today, there are many applications that make substantial use of light bulbs. Lighting bulb bases come in a wide variety.
Based on the letter-number references, you can tell what size light bulb base it is. In contrast to the number, which designates the base's breadth, the first letter indicates the base's shape or form.
Following are the most typical diameters for light bulb bases:
Standard-Medium, normal sized screw in base: E26 or E27
Candelabra, a smaller screw in base: E12
Intermediate: E17
Bi-pin, having pin-in base including two points of contact: G4 or GU24
Twist-And-Lock base: GU10
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1. A student tests the second law of motion by accelerating a block of ice at a rate of 3 m/s².
If the ice has a mass of 12.6 kg, what is the force must the student apply to the ice?
Answer: 37.8 N
Explanation:
F = ma (Newton's 2nd Law)
Force = mass x acceleration
F = (12.6 kg)(3 m/s2) = 37.8 N
Two styrofoam balls are placed so their centers are 3.2 cm apart. The mass of one ball is twice the
mass of the other ball. The larger ball exerts a gravitational force of 2.63 X 10-12 N on the smaller ball.
Calculate the mass of each ball. (Use GUESS method.) Answer 4.49 X 10-3 kg, 8.99 X 10-3 kg
I was given the answers, I just want to know the working equation
Answer:
See below
Explanation:
Fg = G m1 m2 / r^2 Fg = force of gravity and
G, the gravitational constant = 6.6743x10^-11 m^3/(kg s^2)
m2 = 2 m1 is given, then sub in the values:
2.63 x 10^-12 = 6.6743 x 10^-11 ( m1)(2 m1) / ( .032)^2
results in 2 m1^2 = .00004035059
then m1 = .004491 kg and m2 is twice this much
mass 1 = 4.49 x 10^-3 kg as you stated
A car has a weight of 8000 N. The car is supported by four tyres.
The weight on each tyre is equal.
The area of one tyre in contact with the ground is 150 cm².
Calculate the pressure that one tyre exerts on the ground.
Show your working and give your answer in N/cm².
Answer: A
Explanation:
A weight suspended from a spring is seen to bob up and down over a total distance of 14 centimeters triply each second.
8. What is the frequency?
9. What is the period?
10. What is the amplitude?
8. The frequency of the weight suspended from a spring.is 2Hz.
9. The period is 0.5 seconds.
10. The amplitude is 14cm
What is frequency?Frequency simply means the number of oscillation in a unit time. It is the rate at which something repeats itself in a second.
In this case, the spring bob up and down 2 times per second. Therefore, Frequency = 2 Hz
The period is the time taken to complete one oscillation. 2 oscillations takes 1 second
1 oscillation = 1/2 seconds.
Period = 0.5 seconds
Amplitude is the the maximum displacement of the spring. In this case the spring bob up 14 cm. This is it's displacement.
Amplitude = 14 cm
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please respond my question
The astronomy of the star and the parameters of the star in terms of solar units are;
Radius of the star ≈ 5.03 [tex]R_{Sun}[/tex]
Temperature of the star ≈ 0.92 [tex]T_{Sun}[/tex]
Luminosity of the star ≈ 18 [tex]L_{sun}[/tex]
What is the system for astronomy units?The astronomical system of units are a special class of units designed for astronomy.
First part;
One solar radius is specified as [tex]R_{Sun}[/tex] = 6.9551 × 10⁵ km
The radius of the star = 3.50 × 10⁶ km
The radius of the star in units of the solar radius is therefore;
Radius = 3.50 × 10⁶ km ÷ (6.9551 × 10⁵ km) [tex]R_{Sun}[/tex] ≈ 5.03 [tex]R_{Sun}[/tex]Second part;
One unit of the solar temperature, [tex]T_{Sun}[/tex] = 5777 K
The temperature of the star = 5305 K
The stars temperature in units of the solar temperature, is therefore;
Temperature = 5305 K/(5777 K) ≈ 0.92
The temperature of the star in units of the solar temperature is 0.92 [tex]T_{Sun}[/tex]Third part;
The function for the luminosity of a star, L, is; L = 4·π·R²·σ·T⁴
The luminosity of the star = 4 × π × (3.50 × 10⁶)² × σ × 5305⁴
The luminosity of the Sun = 4 × π × (6.9551 × 10⁵)² × σ × 5777⁴
The solar luminosity of the star = (4 × π × (3.50 × 10⁶)² × σ × 5305⁴) ÷ (4 × π × (6.9551 × 10⁵)² × σ × 5777⁴) ≈ 18
The solar luminosity of the star is 18 [tex]L_{Sun}[/tex]Learn more about astronomy here:
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BRAINLIEST!!!! AND 100 POINTS!!!!!
Answer:
b
Explanation:
Because the 20kg block has a higher mass it takes more force to move it. Following Newton's first law. An object at rest wants to stay at rest and one moving wants to keep moving. Considering there's more atoms in the higher kilogram block than the smaller one more atoms would want to stay at rest therefore experience more inertia and accelerate slower.
Which of the following is a true statement about the conservation of energy?
According to the law of conservation of energy, statement which is true about conservation of energy is that the total energy is always conserved.
What is law of conservation of energy ?According to law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Julius Mayer in the year 1842.
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help please
Review the statements below. Select the one that best describes the difference between astronomy and cosmology.
A) Astronomy is a much broader study of the universe as a whole, while cosmology is a more focused study on specific objects or celestial bodies contained within the universe.
B) Astronomy is the study of objects in the universe—how they are formed, their composition, and how they change over time. Cosmology is the study of the entire universe—what objects are contained in the universe, and what is happening to the universe over time, including how it may or may not end.
C) Astronomy is a branch of science that focuses on the beginning, middle, and end of the universe. Cosmology is the study of how objects move, interact, and change.
D) Astronomy is the study of space in general through the use of telescopes and other tools, while cosmology is the study of specific objects in space.
The statement that best describes what astronomy and cosmology is the option B. That says that astronomy study objects of the universe and cosmology study the entire universe.
What is astronomy and cosmology?Astronomy is that science that will study the celestial bodies found in the universe such as stars, planets, asteroids, among others. He will study more specifically the components of the universe. While cosmology studies the universe as a whole and its origin, it will study theories such as the big bang theory.
Therefore, we can confirm that the statement that best describes the difference between astronomy and cosmology is that astronomy is the study of objects in the universe—how they are formed, their composition, and how they change over time. Cosmology is the study of the entire universe—what objects are contained in the universe, and what is happening to the universe over time, including how it may or may not end. So the correct option is B.
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Answer:
option B.
Explanation:
Which type of energy does an object not have if it is not moving?
Answer:
Explanation:
A motionless object can have energy. The energy that the object has is called potential energy.
Energies it does not have may consist of kinetic energy, gravitational potential energy, elastic potential energy, and chemical potential energy
A hamster doing push-ups has a mass of 1 kg and applies force to lift its body 5 cm to complete 0.50 joules of work. If the hamster does this work in 2 seconds, what is its power?
If the hamster does this work in 2 seconds, its power is equal to 0.25 Watt or Joule per second.
What is work done?The work done (W) by an object can be calculated by multiplying the force acting on it by the perpendicular distance covered by the physical object. This ultimately implies that, work done (W) and energy (E) have the same unit i.e Joules (J).
Mathematically, the work done (W) by an object can be calculated by using the following formulas:
Work done (W) = force × distance ..................equation 1.
Work done = power × time ..................equation 2.
Making power the subject of formula in equation 2, we have:
Power = (Work done)/time
Note: The time is measure in seconds.
Substituting the given parameters into the formula, we have;
Power = (0.50 Joules)/2
Power = 0.25 Watt or Joule per second.
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Which has more kinetic energy, a car of mass 500 kg traveling at 15 m/s or a motorcycle of mass 250 kg traveling at 30 m/s?
The motorcycle of mass 250 kg traveling at 30 m/s will have the greater kinetic energy.
What is Kinetic energy?This is the kind of energy possessed by any body that is in motion. It is also known as the moving energy.
From the question,
the mass of the car = 500kg
velocity = 15m/s
Kinetic energy for the car is;
[tex]K = \frac{1}{2} mv^{2}[/tex]
K = 1/2 x 500 x 15 x 15
K = 56, 250J
the mass of the motorcycle = 250kg
velocity = 30m/s
Kinetic energy for the motorcycle is;
[tex]K = \frac{1}{2} mv^{2}[/tex]
K = 1/2 x 250 x 30 x 30
K = 112, 500J
In conclusion, from calculating for both, the kinetic energy possessed by the motorcycle is higher, that means it has more kinetic energy.
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What is the resulting acceleration when a 120 N force acts on an object with a mass of 360kg?
Answer:
Below
Explanation:
Remember:
F = m a
F/m = a = 120 / 360 = 1/3 m/s^2
18. A man dived horizontally with a velocity of 1.5 ms from a 100 kg boat. If the recoil velocity of the boat is 0.9 ms what is the mass of the man?
166.6 kg is the mass of the man
initial momentum=final momentum
m1v1=m2v2
1.5×100=0.9×m2
m2=166.6 kg
Mass is used in physics to express inertia, a fundamental characteristic of all matter. Essentially, it is a mass of matter's resistance to changing its direction or speed in response to the application of a force. The change that an applied force produces is smaller the more mass a body has. The kilogram, the unit of mass in the International System of Units, corresponds to 6.62607015 1034 joule seconds using Planck's constant (SI). One joule is produced by multiplying one kilogram by one square meter per second. The kilogram is determined by exact measurements of Planck's constant since the second and the meter have previously been defined in terms of other physical constants.
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Circle the letter of the cell layer that produces new phloem and xylem.
A. heartwood
B. sapwood
C. bark
D. cambium
Answer:
D: Cambium
Explanation:
The Answer is cambium
Can an object have momentum in space?
Answer: Objects in space can have momentum space because momentum depends on mass and velocity. Unlike other quantities, like weight, mass does not change if an object is on space or on Earth.
Explanation: Because momentum depends on mass and velocity and unlike other quantities, like weight, mass does not change if an object is on space or on Earth.
In a crash, when a head hits an airbag, what is observed when the head first touches the
airbag and when the head stops? (keywords: speed, time, force)
When a head collides with an airbag in a collision, the head's initial velocity and its final velocity are measured.
What is the definition of force?In economics, a power is defined as the pull or draw that modifies an object's velocity. Ingredients that might affect a person's sense of personal work or sleepiness are invisible to the human eye. Its dimensions and form are distinctive.
What does force mean in Example?In daily life, there are many instances of forces, including: weight and force (i.e. the weight of something) the pressure a bat puts on a ball. the amount of force used to brush hair using a brush. the force used by your foot to press the pedal.
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A customer enters a grocery store with an empty shopping cart that has a mass of 20 kg. Another customer is leaving the store with a shopping
cart full of groceries that has a mass of 40 kg. The two customers accidentally bump their carts together.
Explain whether you agree or disagree with Eve's Mypothesis. Use Newton's third law of motion to support your answer.
Eve observes the accident. She hypothesizes that the cart full of groceries applied more force to the empty cart than the empty cart applied to the
full cart.
We disagree with Eve's hypothesis that the cart full of groceries applies more force to the empty cart than the empty cart applies on the cart with groceries.
Mass of empty shopping cart = 20 Kg
Mass of cart full of groceries = 40 Kg
Newton's third law of motion states that each action has equal and opposite reaction. Thus, if empty cart exerts a force on the cart full of groceries, then the cart full of groceries should exert same amount of force on the empty cart when two customers accidently bump their carts. Hence, Eve's hypothesis is opposite to Newton's third law of motion.
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I need assistance with these questions asap.
Answer:
Explanation:
9a) Velocity North
30 m/s * Sine(60) = 25.98076.. m/s
9b) Distance North
25.98076 m/s * (3 hour) but we need hours in seconds b/c that's our velocity units
25.98076 m/s * 10800 s = 280,592.23 m
9c) Velocity East
30 m/s * Cosine(60) = 15 m/s
9d) Distance East
15 m/s * (3 hours)
15 m/s * 10800 s = 162,000 m
9e) Total displacement ( total distance also known as magnitude)
Total Distance = [tex]\sqrt{(Distant North)^{2} + (Distant East)^{2} }[/tex]
TD = [tex]\sqrt{280592.23^{2} + 162000^{2} }[/tex]
TD = 323999.99 m
let's round it to 324,000 m
324 Km
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Answer:
The answer is C inertia
Explanation:
This action is a result of the disks.
A machine works with an efficiency of 20%. The energy input is 200 joules/second. How
much useful energy will the machine generate in 10 minutes?
A. 36 kJ
B. 24 kJ
C. 40 kJ
D. 600 kJ
The quantity of useful energy which this machine would generate in 10 minutes is equal to: B. 24 kJ.
How to determine the efficiency of a machine?Mathematically, energy efficiency can be calculated by using this formula:
Energy efficiency = WO/WI × 100
Where:
WO represents the output energy.WI represents the input energy.For the output energy, we have:
20 = WO/200 × 100
4000 = 100WO
Output energy, WO = 4000/100
Output energy, WO = 40 joules/second.
Note: A minute is equal to 60 seconds.
In 10 minutes, the time is given by:
10 minutes = 10 × 60
10 minutes = 600 seconds.
Now, we can determine the useful energy generated by this machine:
Useful energy = 40 joules/second × 60 seconds
Useful energy = 24,000 Joules or 24 Kilojoules (24 kJ).
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Two microscopic bags each contain two protons. When separated by distance d, electric force on one due to the other is F. When you transfer a proton from one to another without changing anything else. The electric force now is
Two microscopic bags each contain two protons. When separated by distance d, electric force on one due to the other is F. When you transfer a proton from one to another without changing anything else. The electric force now is ¾F.
What is electric force?Electric force is described as the repulsive or attractive interaction between any two charged bodies.
The electric force is one of the various forces that act on objects and has its impact and effects on the given body which is described by Newton’s laws of motion.
The electric force between two electrons is equal to the electric force between two protons when placed at equal distances and this describes that the electric force is not based on the mass of the object, but depends on the quantity known as the electric charge.
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