Physics Test 16...

A and B have different dimensions. Then which of the following relation will be meaningful?

The co-ordinates of a moving particle at any time ‘t’are given by x =  The speed of the particle at time ‘t’ is given by

A player stops a football weighing 0.5 kg which comes flying towards him with a velocity of 10m/s. If the impact lasts for 1/50th sec. and the ball bounces back with a velocity of 15 m/s, then the average force involved is

A spring of spring constant  N/m is stretched initially by 5 cm from the unstretched position. Then the work required to stretch it further by another 5 cm is

A hollow sphere is held suspended. Sand is now poured into it in stages. The centre of mass of the sphere with the sand

Two wires A and B are of the same material. Their lengths are in the ratio 1 : 2 and the diameter are in the ratio 2 : 1. If they are pulled by the same force, then increase in length will be in the ratio

The diagram below shows three soap bubbles A, B and C prepared by blowing the capillary tube fitted with stop cocks S, . When all the three stop cocks are opened and S closed, then 

The relation between U, P and V for an ideal gas in an adiabatic process is given by relation U = a + bP V. Find the value of adiabatic exponent (g) of this gas

Air is pumped into an automobile tube upto a pressure of 200 kPa in the morning when the air temperature is 22°C. During the day, temperature rises to 42°C and the tube expands by 2%. The pressure of the air in the tube at this temperature, will be approximately