The work done in lifting a 600-n barbell 1.6m above the floor.
what is the gain of potential energy of the barbell when it is lifted to this height?
express your answer to two significant figures and include the appropriate units.

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

Asample of a gaseous substance changes into a liquid

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.