Bob weighs 80 pounds. he ran up the steps which rose 14 feet. fred weighs 110 pounds. he ran up the same steps as bob. if both boys reached the top of the 14-foot stairs at the same time, which boy had the greatest horsepower?

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

The ph is the a. independent variable b. the dependent variable c. control group