All the heat generated by a current of 2A passing through a resistor of 6Ω for 2.5s is used to evaporate 5 g of a liquid at its boiling point. What is the s...

A block of material of volume 20cm-3 and density 2.5gcm-3 is suspended from a spring balance with half the volume immersed in water. What is the reading of t...

Which of the following is not a consequence of a force field?

A stone tied to a string is made to revolve in a horizontal circle of radius 4m with an angular speed of 2 rad per sec. With what tangential velocity will th...

A piece of cork floating on water is acted upon by the forces of...

The motion of the prongs of the sounding tuning fork is

Which of the following is used to determine the relative density of the acid in a car battery?

A boy pulls a nail from the wall with a string tied to the nail. The string is inclined at an angle of 60o to the wall. If the tension in the string is 4N, w...

Which of the following is NOT a vector quantity?