Why does the screw have a very low efficiency?

(-A-)Because with a low effort it can lift large loads.
(-B-)Because it take a huge effort to turn in order to lift large loads.
(-C-)Because the input work is much greater than the output work.
(-D-)Because the input work is much smaller than the output work.

The C for anyone who needs it

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j

The government has declared that a hurricane is likely to hit the east coast. which government division is part of acf and provides guidance to citizens? a. job opportunities for low-income individuals b. office of human services emergency preparedness and response c. assets for independence d. low-income home energy assistance program