The image below shows a photo taken with a built-in lens of a digital camera. The bottom photo is taken with the same camera, but with an additional wide-angle lens.
Which wave phenomenon best explains the distortion of the bottom image compared to the top?
The picture of the top is basically a clear image of the building and below it is the exact same building but it is blurred
Diffraction
Dispersion
Reflection
Polarization

Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?

10 newton object is placed 3 meters from the fulcrum. at what distance on the other side would you need to place a 15 newton object to balance the lever? show your work!

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?