Which describes a sound wave?

A) A sound wave travels in a vacuum.

B) A sound wave is a longitudinal wave.

C) A sound wave is an electromagnetic wave.

D) A sound wave has one constant speed.

Two cars (with masses 2000 kg and 1000 kg) collide head on an icy road. Before the collision, the more massive vehicle was moving at 10 m/s to the right and the less massive vehicle was moving at 15 m/s to the left.

Magnetic fields are produced by particles that are (1) moving and charged (2) moving and neutral (3) stationary and charged (4) stationary and neutral

A watt is a measure of power (the rate of energy change) equal to 1 j>s. (a) calculate the number of joules in a kilowatt - hour.

What is the mechanical advantage of the machine shown below? a 5 b 4 c 3 d 2

Which type of radiation detection device uses a phosphor-coated surface to detect radiation?

The heat added to a thermodynamic system minus the work done is equal to which of the following? A. the heat lost from the system B. the internal energy C. the total heat added to the system D. the Carnot efficiency of the system E.

How many kilometers are in 14,000 centimeters

In later years, motors improved and could be run directly from a 60 Hz power supply. As a result, 25 Hz power systems shrank and disappeared.

Acceleration increases over time once a force is applied to the object. Given a force of 10.0 Newtons, which mass will have the greatest acceleration?

The transfer of energy between two objects by electromagnetic waves is called