Which of the following describes the mechanical advantage of a machine?

Describe the difference between mechanical and electromagnetic waves. Give an example of each kind of wave related to telecommunications.

Air is warmed and moisten as it moves through both the mouth and nasal passages. a. True b. False

Determined by the distance between objects and the difference in mass between the objects

Planets move around the sun in elliptical orbits. True. False

A rock is rolled in the sand. It starts at 5.0 m/s, moves in astraight line for a distance of 3.0 m, and then stops. What is themagnitude of the average acfeleration?

What color of light can plants "see"?

Two tiny beads are 25 cm apart with no other charges or fields present. Bead A carries 10 µC of charge and bead B carries 1 µC. Which one of the following statements is true about the magnitudes of the electric forces on these beads

A ball is thrown straight up at 20 m. What is the balls velocity as it hits the ground?

Block 1 and Block 2 have the same mass, m, and are released from the top of two inclined planes of the same height making 30 degree and 60 degree angles with the horizontal direction, respectively.

Water waves change direction when they encounter water of different depths and begin to move at different wave speeds. This is called A. reflection B. constructive interference C. the Doppler effect D. refraction