which of the following is not a characteristic of electromagnetic light waves? a. they can't travel through a vacuum. b. they obey the formula: velocity= wavelength x frequency. c. they can be reflected and refracted. d. they travel at approximately 3 x 108 meters per second through the air.

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?