Which type of wave requires a material medium

through which to travel?

(1) sound (3) television

(2) radio (4) x ray

How are theories supported in the scientific community? They are treated as hypotheses. They are tested by many scientists. They are unproven but accepted as fact. They are rarely altered after publication.

What is the sl unit for momentum

What type of rock can melt to form magma

A twin-sized air mattress used for camping has dimensions of 75 cm by 225 cm by 17.5 cm when blown up.

As a tractor pulls a plow across a field, it exerts a force on the plow in the forward direction. What is the "equal and opposite force" in this interaction, according to Newton's third law?

When you see a straw in a glass of water it looks bent why is this?

Compare the energy and wavelength of a microwave to the energy of a gamma ray.

T/F all compounds are molecules but NOT all molecules are compounds.

particle is projected from the surface of the planet Krypton with a speed equal to 3.6 times the escape speed from that planet's surface.

Does the box contain positive charge, negative charge, or no charge? Does the box contain positive charge, negative charge, or no charge?