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Suppose that an athlete has taken 10^6 J more than his daily requirement. Wanting to compensate for this caloric excess with an equivalent work done climbing a mountain, up to what height must climb the athlete knowing that he has a mass of 80 kg?
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A body, with an initial speed of 30 m/s, stops after traveling a distance of 15 m. How much is its acceleration worth?
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Two resistors, R1=1000 ohms and R2=2000 ohms, are placed in parallel and the resistor R1 is traversed by a current of 12 A. Both converge into a resistor R3 = 400 ohms. The electric potential difference across the resistor R3 is worth
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Two bodies are dropped, with zero initial speed, from the top of two buildings and hit the ground with such speed that the first is equal to twice the second. Neglecting the frictional force with the air, what is the relationship between the respective heights of the two buildings?
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Calculate the work done during a Carnot cycle for an ideal reversible engine that operates between 300 K and 900 K and absorbs 1500 J from a hot reservoir.
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