Q. A rocket weight 4.36 x 10 ^4 n has an engine that provides an upward force of 8.90 x 10 ^5 n. it reaches a maximum speed of 860 m/s. how long must the engine burn in order to reach this speed?
Q. What will be the equilibrium temperature when a 259 block of copper at 258 is placed in a 137 aluminum calorimeter cup containing 836 of water at 16.0?