The speed of sound is greater through a solid than through a gas because the molecules in a solid are A) still. B) vibrating. C) farther apart. D) closer together.

When comparing two isotopes of the same element, will the number of electrons be the same?

You are asked to design a retroreflector using two mirrors that will reflect a laser beam by 180 degrees independent of the incident direction of the beam. What should be the angle between the two mirrors?

If you see a rainbow near the time of sunset, where in the sky will the rainbow be?

What cloud makes hail

Why do you think the side of the UV detector card that was facing the foil detected more ultraviolet light? Explain.

Which is the correctly balanced equation for the reaction of rust, Fe2O3, and hydrochloric acid, HCl? Fe2O3 + HCl → FeCl3 + H2O Fe2O3 + 3 HCl → 2 FeCl3 + H2O Fe2O3 + 6 HCl → 2 FeCl3 + 3 H2O Fe2O3 + 3 HCl → 2 FeCl3 + 3 H2O

How many DNA strands could you fit into a milimeter

A screwdriver with a 1-cm shaft and a 4-cm handle is used to tighten a screw. calculate the ideal mechanical advantage.

Plants make food through photosynthesis, a chemical reaction. What are the starting substances of the reaction?

How long will it take to travel 200,000 m traveling 100 m/s?