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

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

(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) .

A fresh water on a reservoir is 10m deep. A horizontal pipe 4.0 cm in diameter passes through the reservoir 6.0 m below the water surface as shown in figure . A plug secures the pipe opening. . (a) Find the friction force between the plug and pipe wall. (b) The plug is removed. What volume of water flows out of the pipe in 1h ? Assume area of reservoir to be too large.

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

Compare the weigths of a body when it is kept (i) 400m above the surface of the earth and (ii) 800 m below the surface of the earth.

What is the ratio of the weights of a body when it is kept at a height 500m above the surface of the earth and 500m below the surface of the earth, if the radius of the earth is 6400km.

Complete the following sentences: An empty tin container with its mouth closed has an average denstiy equal to that of a liquid. The container is taken 2 m below the surface of that liquid and is left there. Then the container will…...…….

What should be the pressure inside a small air bubble of 0.1mm radius situated just below the water surface. Surface tension of water =7.2xx10^(-2)N//m and atmosphere pressure =1.013xx10^(5)N//m^(2) .

During roasting the temperature should be kept below its m.p. Why ?

During roasting the temperature should be kept below its m.p. Why ?