Four objects are released from the top of a hill of height H and roll to the bottom: a hoop, a hollow sphere, a solid sphere, and a solid cylinder
Each object has a mass M and a radius R.
Which of the following gives the order in which they reach the bottom of the hill, from first to last?

What are the north and south poles of a solenoid change with?

Four identical lab carts each have a mass of 200 kg. different masses are added to the carts and the velocities are measured. all carts move to the right.

Which of the following is a direct benefit of the use of assembly lines in production a. laws against theft fraud and coercion are needed to protect free choice. b. the government needs to plan efficient outcomes. c. competition among producers by itself cannot ensure a wide range of consumer choices. d. works pressure the government to guarantee minimum wages