Subject: Physics (chapter 5) Class: 9th Total Marks: 12
1)
Why
are communication satellites geostationary satellites? (2)
2)
what
do you need to know to determine the mass of our moon? (2)
3)
At
what altitude the value of g would become one-fourth that on the surface of the
earth? (4)
4)
The
value of g is 4.0 ms-2 at a distance of 10 7 m from the center of the
Earth. Find the mass of the Earth. (4)
