This is an example of an undamped forced oscillation where the phenomenon of beats occurs. find the solution of the initial value problem: x" + 7.84x = 2 cos(3), x(0) = x' (o) = 0 x(t) = graph the solution to confirm the phenomenon of beats. note that you may have to use a large window in order to see more than one beat. what is the length of each beat? length = ! would you be able to explain why the beats phenomenon occurs for this particular example?

The ability to make things happen is also called a. heat b. force c. matter d. energy

Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. what is the best explanation of the relationship between wavelength and wave energy? a) wave energy is related only to frequency, not wavelength. b) longer wavelengths have lower frequencies but higher energy. c) the shorter the wavelength, the lower the frequency and the higher the energy. d) the shorter the wavelength, the higher the frequency and the higher the energy.

How do the forces acting on a boat compare to the force acting on a plane ?