A Carnot engine takes 3000 J from a reservoir at 600 K, does some work, and discards some heat to a reservoir at 300 K. What is its efficiency?

50%

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4. Which variables are constant in an experiment? A the responding variables OB the controlled variables hs c the manipulated variables

A rock is dropped from a cliff. What will eventually happen to the rock's motion? A. Gravity will cause the rock to slow down before it reaches Earth. B. Air resistance will cause the rock to accelerate as it falls. C.

A northfield raider defensive back runs 20 m in 2.5 s what's the average speed

As a protest against the umpire's calls, a baseball pitcher throws a ball straight up into the air at a speed of 23.0 m/s. In the process, he moves his hand through a distance of 1.10 m. If the ball has a mass of 0.

The lithospheric plates move an average of

Why do atoms move at different speeds depending on wether they are liquids or solids

What are the arrangement of resistors in series

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?