Most engines will contain how many cylinders in order to maintain a proper balance of weight and forces? a. an even number b. always six c. an odd number d. always four

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s.what is the wavelength?