The power rating of a vacuum cleaner is 0.8 kilowatts. if you use the vacuum cleaner for 2.5 hours, how much energy does it use?

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

Unpolarized light whose intensity is 1.19 w/ is incident on a polarizer. (a) what is the intensity of the light leaving the polarizer? (b) if the analyzer is set at an angle of = 41.0∘ with respect to the polarizer, what is the intensity of the light that reaches the photocell?

Asystematic approach to problem solving is called a (an)