Compared to yesterday, you did three times the work in the same time. To do so, your power output must have been yesterday's output.

When an object is heated it contracts. a. true b. false

An ideal polarizer with its transmission axis rotated 30 degrees to the vertical is placed in a beam of unpolarized light of intensity 10w/m^2. after passing through the polarizer, what is the intensity of the beam? a. 8.7 w/m^2 b. 7.5 w/m^2 c. 5.0 w/m^2 d. 10 w/m^2 e. 2.5 w/m^2

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?