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Kinetic Theory

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New question posted•a year ago
Kinetic TheoryClass 11th

<p><strong>13.1 Estimate the fraction of molecular volume to the actual volume occupied by oxygen gas at STP. Take the diameter of an oxygen molecule to be 3 Å.</strong></p>

3 Views|Posted a year ago
Asked by Payal
New answer posted•a year ago
Kinetic TheoryNCERT Physics 11th

Q.8.1 Answer the following:

(a) You can shield a charge from electrical forces by putting it inside a hollow conductor. Can you shield a body from the gravitational influence of nearby matter by putting it inside a hollow sphere or by some other means?

 

(b) An astronaut inside a small space ship orbiting around the earth cannot detect gravity. If the space station orbiting around the earth has a large size, can he hope to detect gravity?

 

(c) If you compare the gravitational force on the earth due to the sun to that due to the moon, you would find that the Sun’s pull is greater than the moon’s pull

 

(You can check this yourself using the data available in the succeeding exercises). However, the tidal effect of the moon’s pull is greater than the tidal effect of sun. Why?

4 Views|Posted a year ago
Asked by Santosh
S
a year ago

Ans.8.1

(a) No. Unlike electrical forces, gravitational force is independent of the status of the objects.

 

(b) Yes, the size of the space station is large enough and the astronaut will detect the change in Earth's gravity.

 

(c) Tidal effect depends inversely upon the cube of the distance

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