Bronze is an alloy of about 80% copper and 20% tin

Fiona did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects light. she placed a ray box in front of a mirror.

The four lines observed in the visible emission spectrum of hydrogen tell us that

An apple is dropped out of a 12 meter-high tree. How fast will the Apple be moving right before it hits the ground

A 5000 kg elephant steps onto a larg spring and compresses it from 1 m long to 50cm long what is the spring constant of the spring

Which statement best describes how waves carry energy? A. Energy moves from one place to another through the wave. B. Energy increases as it moves through the wave. C. Energy is completely consumed by the beginning of the wave. D.

Following an inelastic collision, what can kinetic energy be converted into? Check all that apply. heat impulse momentum potential energy sound

Air has pressure because a. the stratosphere is thick b. air has mass c. wind moves the air d. temperature warms the air

Which of the following values represents an index of refraction of an actual material

What physical characteristic is the same for a particular substance regardless of the sample size.

In the hydrologic cycle, water evaporates into the atmosphere. It then condenses and falls to the ground as precipitation. How can the water return to the atmosphere?