Can someone please answer this? thank you! Describe, in as much detail as you can, what forces allow a sable star to exist and how may eventually form a black-hole?

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack

What accounts for an increase in the temperature of a gas that is kept at constant volume? a. energy has been removed as heat from the gas. b. energy has been added as heat to the gas. c. energy has been removed as work done by the gas. d. energy has been added as work done by the gas.

Is a volume of space that is empty of matter.