While a kettle boils, 0.018kg of water changes to steam
calculate the amount of energy required for this change
specific latent heat of vaporisation of water = 2.3 x 1j/kg

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

This is the number of complete movements of a wave per second.

Alarge cruise ship of mass 7.00 ✕ 107 kg has a speed of 11.6 m/s at some instant. (a) what is the ship's kinetic energy at this time? (b) how much work is required to stop it? (give the work done on the ship. include the sign of the value in your answer.) (c) what is the magnitude of the constant force required to stop it as it undergoes a displacement of 3.00 km?