Which of the following must be true for "P if and only if Q" to be true?

All BUT one of these factors influence the intensity of a sound wave. That is A) the density of the medium. B) the amplitude of the wave. C) the source of the sound wave. D) your distance from the sound source

The police car with its 300-Hz siren is moving away from the warehouse at a speed of 19.0 m/s.

If the motor in a geared appliance has a rated speed of 3600 rpm and a gear ratio of 6 to 1 the driven gear will turn at speed of

You push on a crate with a force of 10 N to the right, and your friend pushes on the crate with a force of 25 N to the left. Describe and explain the motion of the crate.

A sample of octane in equilibrium with its vapor in a closed 1.0-L container has a vapor pressure of 50.0 torr at 45°C. The container's volume is increased to 2.0 L at constant temperature and the liquid/vapor equilibrium is reestablished.

The equation e = mc2 relates mass and a. energy b. force c. work d. gravity

What should a scientist do to use scientific methods for determining the relative age of Earth's rocks? A be biased in opinion B disregard views of others C use creative ideas D prove that methods are non-testable

If a sample of gas is heated at a constant pressure what will happen to the volume of the gas

1. What is the speed of sound in air that has a temperature of 90.0 °C?

What effect does a doubling of the mass have upon the acceleration of the object? Be quantitative.