Amy swims 500 m (0.5 km) in 6 minutes (0.1 hour). what was her speed in kilometers per hour? a. 8.3 km/hr b. 5 km/hr c. 50 km/hr d. 83 km/hr

Answer as quick as ! kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energyb. motion energyc. sound energyd. thermal energy

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?

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c