It is true that the diameter of the moon is a little less than the distance across the United States.
Answer: Option A
<u>Explanation: </u>
Moon is the natural satellite of our Earth. It revolves around the Earth due to the gravitational force acting on the moon. The moon also has its own gravitational force. The gravitational force of moon is of the gravitational force on Earth.
The mass of moon is kg while the mass of the Earth is
kg. So the moon’s mass is very very less than that of Earth. So the diameter of moon is found as 3,472 km while the diameter of Earth is 12,742 km.
Thus the dimension of moon is of the dimension of the Earth. Even the diameter of moon is little less than the distance across the United States as the distance across United States is 4509 km.
Answer:
Explanation:
<h3>a.</h3>The equation for the voltage V of discharging capacitor in an RC circuit at time t is:
where is the initial voltage, and
is the time constant.
For our problem, we know
and
So
This gives us
and this is the time constant.
<h3>b.</h3>At t = 18.8 s we got:
Each electron has a charge of :
For producing 1 Cuolomb charge we need :
Now, for producing 0.009 C of charge, the number of electrons required is :
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So, Number of electrons passing through the cross section in 3.6 seconds is :
Number of electrons passing through it in 1 Second is :
Now, in 10 seconds the number of electrons passing through it is :
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