Aman leans against a wall with a force of 20 newtons east. what is the force exerted by the man on the wall?

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.