The world’s largest gold bar, worth ten million dollars in 2014, has a base measuring 46 cm × 22 cm and exerts a pressure of 24 000 Pa on the surface it sits on.
a) Calculate the weight of the bar. Write your answer to two significant figures.
b) Calculate the mass of the bar. Write your answer to two significant figures.

therefore, the efficiency is:

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.