The weakened radioactive wastes kept in shielded containers should be buried 50 m deep below the earth surface.

A cylindrical container has cross sectional area of A = 0.05 m^(2) and length L = 0.775 m. Thickness of the wall of the container as well as mass of the container is negligible. The container is pushed into a water tank with its open end down. It is held in a position where its closed end is h = 5.0 m below the water surface. What force is required to hold the container in this position? Assume temperature of air to remain constant. Atmospheric pressure P_(0) = 1 x× 10^(5) Pa, Acceleration due to gravity g = 10 m//s^(2) Density of water = 10^(3) kg//m^(3)

Calculate the value of acceleration due to gravity at a point a. 5.0 km above the earth's surface and b. 5.0 km below the earth's surface. Radius of earth =6400 km and the value of g at the surface of the earth is 9.80 ms^2

In a tank filled with a liquid of refractive index 5//3 , a point source of light is placed 2 m below the surface of water. To cut off all light coming out of water from the source, what should be the minimum diameter of a disc, which should be placed over the source on the surface of water ?

(a) Assuming the earth to be a sphere of uniform density, calculate the value of acceleration due to gravity at a point (i) 1600 km above the earth, (ii) 1600 km below the earth, (b) Also find the rate of variation of acceleration due to gravity above and below the earth's surface. Radius of earth =6400 km, g 9.8 m//s^(2) .

It has been recommended that storage of nuclear waste after sufficient pretreatement should be done in suitably shielded containers buried within rocks about

At what height from the ground will the value of ‘ g ’ be the same as that in 10 km deep mine below the surface of earth

Let us assume that air is under standard conditions close to the Earth's surface. Presuming that the temperature and the molar mass of air are independent of height, find the air pressure at the height 5.0 km over the surface and in a mine at the depth 5.0 km below the surface.

Study the following information carefully and answer the given questions. Eight boxes i.e. K, L, M, N, O, P, Q and R kept one above the other. All the boxes are arranged from top to bottom in a stack. Each box contains different colour i.e. Blue, Red, Black, Orange, Yellow, White, Green and Purple. All the information is not necessarily in the same order. Three boxes are kept between box L and box R which is kept above box L. Box O does not contain Yellow colour. Two boxes are kept between the box which contains Red colour and M. The number of boxes is kept above the one which contains Red colour is same as the number of boxes is kept below the one which contains Black colour. The box which contains Black colour is not kept adjacent to box K. Three boxes are kept between those which contain Black colour and Purple colour. Box N is kept one of the boxes above the one which contains Orange colour. Box Q is kept just above the box which contains Purple colour. Not more than two boxes are kept above the box which contains Red colour. More than two boxes are kept between box Q and box K. The box which contains Blue colour is kept just above the one which contains Green colour. Three boxes are kept between the box which contains Blue colour and the box O. Two boxes are kept between the box K and the box which contains White colour. More than two boxes are kept between the box N and the box which contains Yellow colour. How many boxes are kept between the box Q and the one which contains Yellow colour?

Study the following information carefully and answer the given questions. Eight boxes i.e. K, L, M, N, O, P, Q and R kept one above the other. All the boxes are arranged from top to bottom in a stack. Each box contains different colour i.e. Blue, Red, Black, Orange, Yellow, White, Green and Purple. All the information is not necessarily in the same order. Three boxes are kept between box L and box R which is kept above box L. Box O does not contain Yellow colour. Two boxes are kept between the box which contains Red colour and M. The number of boxes is kept above the one which contains Red colour is same as the number of boxes is kept below the one which contains Black colour. The box which contains Black colour is not kept adjacent to box K. Three boxes are kept between those which contain Black colour and Purple colour. Box N is kept one of the boxes above the one which contains Orange colour. Box Q is kept just above the box which contains Purple colour. Not more than two boxes are kept above the box which contains Red colour. More than two boxes are kept between box Q and box K. The box which contains Blue colour is kept just above the one which contains Green colour. Three boxes are kept between the box which contains Blue colour and the box O. Two boxes are kept between the box K and the box which contains White colour. More than two boxes are kept between the box N and the box which contains Yellow colour. How many boxes are kept above the one which contains Orange color?