How much force is needed to push a 54kg sled that is accelerating 5 m/s^2

Which of the following are also major levels of classification? A. Genus B. Species C. Group.

What is tan (27°) ? A. 0.89 B. 0.51 C. 0.45 D. 0.27

What is the atmosphere made up of?

A 5.83 kg object is released from rest while fully submerged in a liquid. The liquid displaced by the submerged object has a mass of 2.72 kg. Take the upward direction to be positive. What is the displacement of the object in 0.

a force 10N drags a mass 10 kg on a horizontal table with acceleration 0.2m/s. If the acceleration due to gravity is 10m/s2, a coefficient of friction between the moving mass and a table is?

The metric system and metric conversions are?

Ron bicycles forward with an acceleration of 2.1 m/s2. If he is applying a forward force of 195 N, what is his mass?

Diane swim 5 kilometers against the current in the same amout of time it took her to swim 15 kilometers with the current. The rate of the current was 2 kilometers per hour. How fast would diane swim if there were no current?

A man paddles a canoe in a long, straight section of a river. The canoe moves downstream with constant speed 5 m/s relative to the water. The river has a steady current of 1 m/s relative to the bank. The man's hat falls into the river.

In an atom, almost all of the mass is concentrated in a tiny nucleus because