True or false induction works due to the movement of protons

What type of electromagnetic wave is used in security pens? a. x-rays c. microwaves b. visible light d. ultraviolet radiation select the best answer from the choices provided

If a spring has a k value of 100 newtons per meter and it is stretched 0.50 meters, what is the restoring force of the spring?

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =