Two balls, a and b are thrown at the same angle above horizontal, but initial velocity of ball a is two times greater than initial velocity of ball b. ignore air resistance. we can conclude that maximum height reached by ball a is (section 4.3) two times maximum height reached by b greater than maximum height reached by b, but we don't have enough information to give exact answer. four times the maximum height reached by b same as maximum height reached by b

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted