26.The time period of a satellite in a circular orbit of radius R is T. The radius of the orbit in which time period is 8T is

27.Inside a uniform spherical shell:

28.A body weighing 20 kg on the surface of the earth is taken to a place 6000 km below the earths surface. Assuming the earths radius to be 6000 km, the weight of the body at that depth is:

29.The binding energy of a system comprising of Earth and satellite is (Letters have usual meanings)