The ratio of output power to input power, in percent, is called

A. conductivity.

c. work.

B. efficiency.

d. horsepower.

Why are pots and pans made of metals like steel and their handles made of plastic?

If Margo pushes a box 25 meters, using a force of 45 Newtons, and it takes her 15 seconds to do so, how much power is she using? A. 75 W B. 80 W C. 115 W D. 125 W

Name two portable devices: one that uses a primary cell and one that uses a secondary cell (rechargeable battery).

A wheel is rotating freely at angular speed 660 rev/min on a shaft whose rotational inertia is negligible. A second wheel, initially at rest and with 5 times the rotational inertia of the first, is suddenly coupled to the same shaft.

What is the difference in the motion between a positive and a negative initial velocity?

An arrow is shot upward on mars from ground level with a velocity of 60 meters per second. Its height (in meters) after t seconds is given by 2 s (t) = 60t - 1.9t^2.

Energy transformations in a bouncy house

Suppose gene A on the left chromosome is damaged and no longer functions. what form of the trait would show? Why?

What is the use of scientific knowledge and research for an action

How do evaporation and condensation relate to heat