Why would the bulb not light?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

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.

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o