If mechanical energy is conserved, then a pendulum that has a potential energy of 20 j at its highest point and 0.5 j at its lowest point has as its kinetic energy at its lowest point.

20 j
0.5 j
19.5 j
20.5 j

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.

What are atoms of the same element with varying number of neutrons

An object is kept at 45 m high and how much time will it take to reach the ground