Why does a skier wear polarized glasses instead of glasses that are used for reading?
a)polarized glasses increase the brightness of light compared to regular glasses.
b)polarized glasses enhance the sharpness of objects compared to regular glasses.
c)polarized glasses are less expensive than regular glasses.
d)polarized glasses decrease reflected glare compared to regular glasses.

First answer marked as brainiest which is the correct equation describing the first law of thermodynamics? a) when the internal energy of a system changes, it equals the amount of heat added plus the work done. b) when work is done by the piston, it is equal to the heat added plus the change in internal energy of the system. c) when heat is added to the system, it is equal to the amount of work done by the piston plus the change in internal energy of the system.