A sailboat sits tied up at the dock. Which forces are acting on it?
(A)
applied force and tension force
(B)
electrical force and applied force
(C)
gravity and electrical force
(D)
tension force and gravity

The air that we breath is made mostly of which gaseous molecule

1) what is the power in horsepower of a 100 watt light bulb? what is the power in kilowatts of a 200 horsepower engine? 2) if a cars engine is providing 3000 n of force to keep the car moving at 5 m/s, what is the engine’s effective power? 3) how many gallons of water will be pumped from a well 30 feet deep by a 1/2 hp engine in 1 minute? (1 gallon weighs 8.34 pounds)

The diagram shows a wave. the quantity shown is the amplitude. this quantity is directly proportional to which of these other quantities? a) energy b) frequency c) period d) wavelength