A bullet with mass 12g and horizontal speed of 70m/s strickes a block of wood 400g and instantly comes to rest with respect to the block. the block is suspended from ceiling by means of thin wiree , calculate the height to the block rises. also estimate the amount of energy Lost!!?

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?