A crate is pulled across a level frictionless floor by a force of 140 N applied horizontally to a rope. How much power is generated when the crate reaches 6.00 m/s?
(3
840 W
O 4200 W
420 W
2100 W

Density of salty water as compared to the density of pure water is(a) is less(b) is always equal(c) is always more(d) may be less or more

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.

Which two particles are found in the center of an atom