Whenever students answer questions incorrectly in class, the professor takes off 1 point on their next exam scores. As a result, very few students volunteer to answer questions. This example best illustrates the concept of:

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?

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

The discovery of the electron as a subatomic particle was a result of