Which uses more electricity a 1700 w hair dryer or a 1200 w microwave: both running for 5 minutes?

If a clock aboard a space ship traveling at 0.900 c of the speed of light relative to earth chimes once at the beginning of the hour and again when it reads one hour later, how much time would an observer on earth say elapsed between the two chimes?

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)