What are the two categories of waves

Which universal force acts on protons and neutrons in an atom's nucleus?

A traveling electromagnetic wave in a vacuum has an electric field amplitude of 71.1 V/m. Calculate the intensity S of this wave. Then, determine the amount of energy U that flows through area of 0.0275 m 2 over an interval of 16.

The difference in temperature is low near sea. Give reason.

A system consists of three particles with these masses and velocities: mass 3.00 kg, moving north at 3.00 m/s; mass 4.00 kg, moving south at 3.70 m/s; and mass 7.00 kg, moving north at 2.00 m/s.

20 cubic inches of a gas with an absolute pressure of 5 psi is compressed until its pressure reaches 10 psi. What is the new volume of the gas? (Assume that there's no change in temperature.

A rectangular block has dimensions 2.9 cm x 3.5 cm x 10.0 cm. the mass of the block is 615.0 g. what is the volume and density of the block? (answer it with correct numbers of significant figures)

Which of the following are products of cellular respiration? Sunlight Oxygen ATP Water Carbon Dioxide

Do magnetic field lines ever start or end anywhere?

What effect do oceans have on the temperature of coastal areas? A. Ocean breezes warm the coastal land constantly. B. Ocean currents always cool a coastline. C. Ocean winds prevent extremes of temperature on coastal lands. D.

Vf=vi+at solve for t