A200.0 kg piano is elevated by a crane to a height of 10.0 meters above a sidewalk. if the rope holding the piano breaks, what will the potential energy of the piano be when it has fallen 5.00 meters?

a) 0 j
b) 9,810 j
c) 10,000 j
d) 19,620 j

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?