An object of mass m is dropped from height h above a planet of mass m and radius r. find an expression for the object’s speed as it hits the ground.

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.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Could we see a galaxy that is 20 billion light-years away?