Which is not a device for reproducing sound? phonograph MP3 player gramophone microphone

Which type of scientific statement describes a proven fact about how things function in nature? a law a theory an inquiry a hypothesis

Express the kinetic energy K in terms of the potential energy U. K=GMm/2R

Suppose three tuning forks of frequencies 260 Hz, 262 Hz, and 266 Hz are available. What beat frequencies are possible for pairs of these forks sounde?

The angle a vector makes with the x-axis of a coordinate system must be what size in order to make one or more of its components negative?

Would the density of a person be the same on the surface of the earth and on the surface of the moon?

Determine the total mechanical energy of a 250 g baseball if it has a velocity of 30 m/s when it leaves the pitcher's hand 1.2m above the ground.

When distances were carefully measured from Earth to globular clusters above and below the Milky Way plane (where our view of them is not obscured by interstellar dust and gas), their distribution was found to be

Imagine you transfer heat into a gas. This heat splits up in two different ways: Additional thermal energy making the gas hotter and "fuel" for the gas to do work. Let's suppose, 64% of the transferred heat transforms into thermal energy.

How much heat is absorbed by a 61g iron skillet when its temperature rises from 5oC to 29oC?

Explain the relationship between motion and frame of reference.