Well we have two concepts of gravity now. In Newton's concept masses create forces between them. In Einstein's concept mass distorts time and space around it and makes masses move as if there are forces between them.
So whichever concept you prefer it's the presence of mass that creates gravity.
Answer:
do you have any pictures or any answers we can choose from?
Explanation:
This is an incomplete question.
Heat always flows from higher temperature to lower temperature. So option A. heat will flow from the air into the coolant is the correct answer.
Answer:
there are 5 hydrogen atoms in that formula
It's true that mechanical waves require a medium for transmission.
