A mailman performed 296 J of work lifting a box of 1.6 m. How much force did the mailman use?

What statement is NOT true about fossils? a. Fossils give us clues about past climate b. Fossils give us clues about the ground they are formed in c. Fossils give us clues about surface changes d.

A hockey puck, mass of 0.115 kg, moving at 35 m/s strikes a ray thrown on the ice by a fan. The ray has a mass of 0.265 kg. The puck and the ray slide off together. Find their velocity.

When you drive a car and take a quick look on the speedo meter what do you see velocity or speed

The color that travels on the shortest wave is?

Which describes the relationship between the frequency, wavelength, and speed of a wave as the wave travels through different media? A). As speed changes, wavelength changes and frequency remains constant. B).

Steam moves into a cylinder of a steam engine at a constant pressure and does 2.34 J of work on a piston. The diameter of the piston is 3.4 cm and the piston travels 4.6cm. What is the pressure of the steam?

Identify each type of simple machine.

A car's speedometer reads 20 m/s after accelerating, from a standing start, for 25s. What was the magnitude of its acceleration?

What happens to the period of a pendulum and the period of a spring as the amplitude of the oscillation increases? Briefly give an explanation for this relationship.

The element that is most abundant in earth is