An 800-g bird has 47.0 J of gravitational potential energy when it is perched high up in a tree. Calculate the bird’s vertical height from the ground.

If you quadruple the temperature of a black body, by what factor will the total energy radiated per second per square meter increase? 1,024 64 16 4 256 submit answer

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

Decreased sensitivity to an unchanging stimulus is known as