How does mechanical energy relate to heat energy? Mechanical energy would not exist without heat energy.
Mechanical energy can change into heat energy.
All objects need heat energy to work.
D. Heat energy would not exist without mechanical energy.

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

Why did rutherford say that bombarding atoms with particles was like "playing with marbles" what

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.