What is one way to increase the amplitude of a wave in a medium

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block

What is a carrier wave and how does it affect what you hear on the radio