What is a covalent bond considered

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.

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.