4. A ball is dropped from a 10. meter high ledge. How fast is it travelling just 1 before hitting the ground? (Do not include units in your answer.)

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 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.

The energy released by a nuclear fusion reaction is produced when