Which one of the following is the equation for the first law of thermodynamics?

A. PV = nRT

B. PV/T

C. ΔU = Q - W

D. W = PΔV

What two things increase as you move towards the center of the earth?

Simple machines make work easier. Most simple machines reduce the amount of effort force needed to move an object. In this wheel and axle system, the wheel and axle is used to pull a bucket up. A person turns the handle (P), using effort force.

A center lane with solid and broken yellow lines that is used by vehicles making left turns in both directions is called a

What is the current through a 11v bulb with a power of 99w

The resistance of a circuit is doubled. How is the value of the current affected? A. The current decreases by a factor of 1/4 B. The current decreases by a factor of 1/2 C. The current increases by a factor of 2. D.

a 2 kg rock is dropped from the top of a 30 m High building calculate the ball at the time that it strikes the ground

Water, with a density of rho = 1145 kg/m 3, flows in a horizontal pipe. In one segment of the pipe, the flow speed is v 1 = 7.33 m/s. In a second segment, the flow speed is v 2 = 1.57 m/s.

What does the color of a star determine

Scientific cosmology Choose one: A. investigates the overall structure and history of the Universe. B. pertains to legends and verbal history about the beginnings of the Universe. C. proves the Big Bang theory. D.

Which statement best describes longitudinal waves? A) Particles of the wave medium move perpendicular to the direction of propagation of the wave. B) Longitudinal waves do not require a material medium for propagation.