The speed of sound at temperature ofin the air is 360m/s.

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Carbon 14 is a naturally occurring stable