Describe in your notebook how the following systems can be modeled like a spring undergoing simple harmonic oscillation:

a. A diving board
b. A planet orbiting a star
c. A guitar string
d. An engine

In what direction does the medium move relative to the direction of the wave? explain.

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your