The cloud of interstellar dust and gas that forms a star is known as a
a. protostar.
b. white dwarf.
c. red giant.
d. nebula.
user:
15. with an average surface temperature of about 737 k, is the hottest planet.
a. mars
b. mercury
c. earth
d. venus

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

Answer as quick as ! kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energyb. motion energyc. sound energyd. thermal energy

Contains chemical energy. a. heat b. light c. natural gas