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VashaNatasha [74]
3 years ago
8

a 2,400 kg car drives north towad a 60kg shopping cartthat has a velocity of zero the two objects collide giving the car a final

velocity 4.33m/s north and the shopping cart 8.88m/s north what is the in itial velocity of the car
Physics
1 answer:
Usimov [2.4K]3 years ago
7 0

Answer:

4.552m/s

Explanation:

V=\frac{m_{1}v_{1}+m_{2}v_{2}}{m_{1} } =\frac{2400*4.33+60*8.88}{2400}=4.552m/s

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From what height must an oxygen molecule fall in a vacuum so that its kinetic energy at the bottom equals the average energy of
alexandr1967 [171]

Answer:

The  value is  h  = 11930 \ m

Explanation:

From the question we are told that

    The  temperature is  T  =  300 \  K

     

Generally the root mean square speed of the  oxygen molecules is mathematically represented as

        v  =  \sqrt{\frac{3 *  R  *  T }{M} }  =  \sqrt{ 2 *  g  *  h }

Here  R is the gas constant with a value  R  =  8.314 \  J\cdot K^{-1} \cdot \  mol^{-1}

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So  

     \frac{3 *  8.314   *  300 }{0.032}   =  2 *  9.8  *  h

=>    h  = 11930 \ m

   

4 0
3 years ago
Meg goes swimming on a hot afternoon. When she comes out of the pool, her foot senses that the pavement is unbearably hot. Suppo
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6 0
4 years ago
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Which equation is used to calculate the electric potential in an electric field from a point charge? V = kq over d squared V = k
Contact [7]

Answer:

The answer is V =delta U over q

Explanation:

Electric potential is defined as the magnitude of the electric field through the potential energy that a charge would have if placed at that point. Mathematically, the potential is defined with the following expression:

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where:

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Answer:

1000 m/s

Explanation:

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Acceleration of the ball, a = ? m/s²

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F = qE, on substituting, we have

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F = ma, and as such,

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