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A 60 kg student consumes 2500 Cal each day and stays the same weight. One day, he eats 3500 Caland, wanting to keep from gaining weight, decides to "work off" the excess by jumping up and down. With each jump, he accelerates to a speed of 3.5 m/sbefore leaving the ground. Please show step by step.
How many jumps must he make? Assume that the efficiency of the body in using energy is 25%
The rotor of an electric motor has rotational inertia Im = 5.12 x 10-3 kg·m2 about its central axis.Calculate the number of revolutions of the rotor required to turn the probe through 31.3° about its central axis
A 3.2 kilogram ball strikes a wall with a velocity of 6.4 m/s to the left. determine what constant force exerted on ball by the wall
A 62.8 kg canoeist stands in the middle of her canoe. The canoe is 3.3 m long, and the end that is closest to land is 2.5 m from the shore. What is the canoe's mass
Two friends, Burt and Ernie, are standing at opposite ends of a uniform log that is floating in a lake. The log is 3.2m long and has mass 290kg. what distance has the log moved by the time Ernie reaches Burt
A bicycle racer is traveling at 10 m/s with an acceleration of 0.5 m/s^2. The radius of the bicycle wheel is 33 cm. What is the angular velocity of the bicycle wheels
A merry-go-round in a park consists of an essentially uniform 200-kg solid disk rotating about a vertical axis. The radius of the disk is 6.0 m. The merry-g0-round is rotating at 0.20 rev/s. If now a 100-kg man quickly sits down on the edge of it,..
This caused Goodly to borrow to meet its obligations, resulting in a drop in its stock price. Are the directors liable? Explain why or explain why not?
Compute the grade point average (GPA) and round the result to two decimal places.
The process is claimed to produce 2000 J/min of work and to require an undisclosed amount of heat transfer with a heat reservoir at 300 K. Should inventor be issued a patent of this device.
A 30 charge is moved from a point where = 190 to a point where = -70. How much work is done by the force that moves the charge
Five Coulombs of charge pass a point in a wire in 20 second. Estimate what is the average current flow
Calculate the absolute pressure at an ocean depth of 750 m. Assume the density of sea water is 1020 kg/m3 and that the air above exerts a pressure of 101.3 kPa.
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