The age of the universe is thought to be about 14 billion years. assuming two significant figures, write this in powers of ten in (a) years, (b) seconds.

Ineed the answer to question 1 , i’m desperate

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg. how much energy e must be supplied to the device? express your answer in joules.