Aconveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. the sand is initially at rest, then moves at a speed of 0.20 m/s along the conveyor belt. what is the instantaneous power generated by this machine?

524 w

1.3 kw

3.9 kw

6.7 kw

Ais not a compound machine. a. bolt b. shovel c. handcart (dolly) d. see-saw (teeter totter)

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above