As light passes from air into water (which has a higher refractive index) A. the speed increases and the frequency increases.
B. the speed decreases and the wavelength increases.
C. the speed decreases and the wavelength decreases.
D. the speed decreases and the frequency decreases.
E. the speed increases and the wavelength decreases.

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)

The solid that is formed and usually sinks to the bottom of a solution is the