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Rainbow [258]
4 years ago
11

ASAP PLZZ FINALS TOMR GIVE U ALOT OF POINTSS

Physics
1 answer:
Annette [7]4 years ago
7 0

Answer:

B

Explanation:

Let m be mass of the object and v be speed of object b.

Kinetic Energy of B = 1/2 mv^2

Kinetic Energy of A = 1/2 m(2v)^2

= 2 mv^2

= 4 (1/2 mv^2)

= 4 × Kinetic Energy of B

Hence Object A has four times the kinetic energy of object B (<em>A</em><em>n</em><em>s</em><em> </em><em>B</em><em>)</em>

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. The total energy when a body falls freely towards earth remains constant. True or false?
Colt1911 [192]
This is true, The total energy when a body falls freely towards earth remains constant.
7 0
3 years ago
Prove dimensionally that: PV=RT
Natali5045456 [20]

The ideal gas Law

PV = nRT

Where does this come from?

Robert Boyle found

PV = a constant

That is, the product of the pressure of a gas times the volume of a gas is a constant for a given sample of gas. In Boyle's experiments the Temperature (T) did not change, nor did the number of moles (n) of gas present. So Boyle found

PV = (nRT)

but did not explore the effect the temperature, or the number of moles would have on pressure and volume.

Jaques Charles found

V = (a constant) T

That is, the volume of a given sample of gas increases linearly with the temperature if the pressure (P) and the amount of the gas (n) is kept constant. So Charles found

V = (nR/P) T

Avagadro's Postulate

At the same temperature and pressure equal volumes of all gasses contain the same number of molecules.

V = n (a constant)

V = n (RT/P)

Hope that helps!!!! : )

7 0
4 years ago
7. You are floating motionless on a rubber raft in thelmiddle of a pool. A friend forms a wave by slapping the water
german

Answer:

Yes if it continues in that direction.

Explanation:

3 0
4 years ago
3 m/s
zloy xaker [14]

Answer:

0.75Hz

Explanation:

Given parameters:

Speed of the wave = 3m/s

Wavelength  = 4m

Unknown:

Frequency of the wave  = ?

Solution:

The speed of a wave is given by the expression below:

     Speed  = frequency x wavelength

  Frequency  = \frac{Speed }{Wavelength}   = \frac{3}{4}    = 0.75Hz

5 0
3 years ago
Student C said, “I don’t agree with either model you drew. I think the Sun goes around Earth. The evidence is that you can see t
xxTIMURxx [149]

Answer:

See the explanation below

Explanation:

Student c's belief is fulfilled only for the movement of the earth with respect to the sun. But it has no validity or does not exist when it is necessary to explain other physical phenomena with respect to other satellites. For example, how would you explain the phases of the moon, if the Earth is located in the center of the Galaxy?, another serious question regarding the observations made by scientists millions of years ago, where they observed that the distances of the Earth from other planets were changing, with respect to time. If the Earth was in the center, all the planets and the sun would revolve around it preserving a constant distance (radius), at all times.

Other phenomena to explain would be the seasons on Earth, these are due to the axis of inclination of the Earth and the rotation of it around the sun.

5 0
3 years ago
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