A car has 3000 J of energy. What will happen if the speed is doubled?

Suppose a car has 4000 J of kinetic energy. What will be its kinetic energy if the speed is doubled? What if the speed is tripled?

Suppose you are told that the linear size of everything in the universe has been doubled overnight. Can you test this statement by measuring sizes with a meter stick? Can you test it by using the fact that the speed of light is a universal constant and has not changed? What will happen if all the clocks in the universe also start running at half the speed?

Calculate the kinetic energy of a 20 kg wooden cart moving with a speed of 5 m/s. Calculate the kinetic energy again when the speed is doubled.

What happen to area of circle, if its radius is doubled?

Two capacitors are in parallel and when connected to a source of 3000 V, store 250 J of energy. When they are connected in series to the same source, the energy stored decreases by 190 J for the same potential. Their capacities are in the ratio

A moving electron has 5 xx 10^(-25) J of kinetic energy .What is the de Broglie wavelength ?

Explain what will happen when the temperature of gas is doubled and pressure is raised 4 times . What will be the effect on the volume of the gas.

When the speed is doubled, KE also gets doubled.

The kinetic energy of an object of mass m moving with a velocity of 5 m//s is 25 J. What will be its kinetic energy when its velocity is doubled ? What will be its kinetic energy - when its velocity si increased three times ?

What will happen to the area of a square if its side is: (i) doubled (ii) halved?