3 years ago

Please helppppppp!!!!!!!!!!!!!!!!!!!!!!!!

Physics

1 answer:

kykrilka [37]3 years ago

3 0

Answer:

I think the Bulb No. 2 will stop emitting light if the bulb No. 1 burns out.

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A 48.5 kg student runs down the sidewalk and jumps with a horizontal speed of 4.25 m/s onto a stationary skateboard. The student

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<u>Answer:</u>

2.39 kg

<u>Explanation:</u>

There is conservation of momentum here in this problem so we will use the following problem:

$m_1u_1+m_2u_2=(m_1+m_2)v$

where the mass of the student $m_1$ is 48.5 kg,

the mass of the skateboard $m_2$ is $m_2$ kg,

the initial speed of the student $u_1$ is 4.25 m/s; and

the speed of the student and skateboard $v$ is 4.05 m/s.

So substituting the given values in the above formula to get:

$(48.5*4.25) + (m_2 * 0) = (48.5 + m_2 ) * 4.05$

$206.125=196.425+4.05m_2$

$206.125 - 196.425 = 4.05m_2$

$m_2=\frac{9.7}{4.05}$

$m_2=2.39$

Therefore, the mass of the skateboard is 2.39 kg.

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Since isotopes of any given element all contain the same number of protons,

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Water is a liquid and both going through air gas and liquid cause fluid friction.

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That is why the cell needs to be small

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