When the heater blows hot air around to heat your house, this is an example of heat being transferred by, a. convection b. conudction c. radiation d. evaporation

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

Which of the following is an example of units for speed

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?