What is the magnitude of the force acting on a spring with a spring constant of 300 N/m that is stretched 15.3cm?
2.81 N
19.2 N
39.3 N
45.9 N

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational

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