If a system requires 150 j of input work and produces 123 J of output work, whats its effiency

A motor-driven winch pulls a 50.0 kg student 5.00 m up the rope at a constant speed of 1.25 m/s. how much power does the motor use in raising the student? how much work does the motor do on the student?

A motorcycle and rider have a total mass equal to 300kg. The rider applies the brakes, causing the motorcycle to accelerate at a rate of - 5 m/s. what is the net force on the motorcycle?

Conduction involves the transfer of electric charge or blank

What are base isolators and give an example of an earthquake proof building

The two basic properties of matter are mass and density mass and volume omass and weight welght and volume

What is the name of the fine soil particles deposited by rivers?

A ball of mass 200 g rolls along the ground at a speed of 5.2m/s. calculate the kinetic energy of the ball. Give answer to one decimal place.

A light bulb that is connected to a 120 V source drawers 1.7 A. What is the resistance of the light bulb? A. 14 B. 71 C. 200 D. 0.014 E. 0.0

Which of the following is an example of heat transfer through radiation? A. A pot of soup warming on a hot burner. B. A crayon melting on a hot sidewalk. C. Beach sand getting warmed by the sun. D. An egg getting cooked in a pot of boiling water.

Which of the following best describes each particle? A. Protons are negative, neutrons are neutral, and electrons are positive. B. Protons are neutral, neutrons are positive, and electrons are negative. C.