Which would use more energy, a 50-watt bulb or a 75-watt bulb left on for the same amount of time?

Arock collection comes from which part of earth?

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.