Which option is an example of a good blackbody radiator? A. Water that bends the light that enters it
O B. A mirror that reflects the light that strikes it
C. A classroom full of students in a school
O D. A stove burner that glows red when it is turned on

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?

Distinguish between linear momentum and angular momentum

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.