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Rocky's base metabolic rate is 100 W (when not exercising). He weighs 80 kg. This morning, he climbed stairs 25-cm high at the rate of 140 steps per minute for 30 minutes on a Stairmaster. Assume potential energy is expended climbing up and 20% of that energy is used climbing down.
a. How much energy did he burn (in J and in kWh)?
b. What was his total average power (in W) during the exercise?
Calculate the peak voltage of a generator that rotates its 205 turn, 0.100 m diameter coil at 3600 rpm in a 0.850 T field
q1. what are the average velocity and acceleration of the tip of an hour hand of a clock in the interval of noon to
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Suppose that in an insulated container, 0.100 of water at 20.0 is mixed with 1.500 of ice at. Find the amount of heat it would take to bring all of the ice to its melting point
A 0.65 percent C hypoeutctoid plain carbon steel is slowly cooled from about 950°C to a temperature just slightly above 723°C. calculate the weight percent austenite and weight percent proeutectoid ferrite in this steel. Explain it.
A 4.9-N hammer head is stopped from an initial downward velocity of 3.2 m/s in a distance of 0.45 cm by a nail in a pine board. Calculate the downward force F exerted by the hammer head on the nail while the hammer head is in contact with the nail a..
A ball of mass 5.8 kg and radius 13 cm rolls without slipping horizontally at 5.6 m/s and hits a spring attached to a wall. What is the maximum change in length of the spring
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