Which of the following makes a good electrical insulator? why? a. glass, because it is slippery and smooth. b. glass, copper and wood, because electrons move freely inside them. c. glass, wood and plastic because electrons cannot move freely inside them. d. copper because it is metal.

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?