Some animals communicate by emitting low frequency sound waves. When the animal emits a low frequency sound wave what is the resulting pitch?

If an object experiences a leftward net force, then it will accerlate in which direction

A train leaves the train station at noon and travels at a constant speed of vt = 50 mi/hr on a straight track. 2 hr later, a car leaves the same train station and travels in the same direction at vc = 70 mi/hr on a road next to the train track.

What is the work done on a 34-N weight if it is lifted up 1 km? A. 17 J B. 34 J C. 0.034 J D. 34,000 J

21 kg brick v=6.1 m/s sticks to a 2.9 kg cart v=.26 m/s

What can you infer about an object moving at a constant velocity

The process that converts liquid to gas is melting true or false

A balloon was partially filled with helium gas at room temperature. It occupied 4.0 liters of volume at 700.0 mm Hg atmospheric pressure. When the balloon was released, it traveled upward until it burst at 99 mm Hg atmospheric pressure.

A packing crate rests on a horizontal surface. It is acted on by three horizontal forces: 600 N to the left, 200 N to the right, and friction. The weight of the crate is 400 N.

Which type of radiation has the lowest penetrating ability?

For which one of the following situations will the path length equal the magnitude of the displacement? a A ball on the end of a string is moving in a vertical circle. b A toy train is traveling around a circular track.