A 64 g ball is shot into the barrel of a spring-gun with a speed of 24 m/s. The sprig-gun has a mass of 280 g and is initially at rest on a frictionless surface. The ball sticks in the barrel at the point of maximum compression of the spring. Assume that friction between the ball and the barrel is negligible. Note that momentum is conserved as the ball becomes stuck in the spring-gun because the net-force on the system containing both the ball and the spring-gun is zero. What is the change in kinetic energy of the ball and spring-gun?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.

Which accurately compares concave and convex lenses?