Stan applies a force to stretch a spring, then allows the spring to recoil to half the length it was stretched. How much force is required to keep the spring at its new deformation?

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

4. who was the first one to measure the speed of light and conclude that it is finite? 5. who was the first philosopher who thought the speed of light is finite? 13. what is the speed of light numerically? 14. give an example of something moving faster than light 15. give an example for some particles or waves that

An athlete is holding 24 lb of weights at a height of 6 inches above the stack as shown. to lower the weights, she applies a constant force of 5 lb to the handle. determine the velocity of the weights immediately before they hit the stack.