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A.) The box of a well-known breakfast cereal states that one ounce of the cereal contains 107 Calories (1 food Calorie = 4186 J). If 2.03 % of this energy could be converted by a weight lifter's body into work done in lifting a barbell, what is the weight of the heaviest barbell that could be lifted a distance of 2.04 m?
B.) The latent heat of vaporization of H2O at body temperature (37.0°C) is 2.41E+6 J/kg. To cool the body of a 77.7 kg jogger [average specific heat capacity = 3460 J/(kg*°C)] by 1.50°C, how many kilograms of water in the form of sweat have to be evaporated?
What is the frequency of string that was tightened.How high does it rise above the ground.
A 40-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, kinetic energy decreases to 240J from 470J. How high does she rise during this interval? Avoid air resistance.
A mouse is running away from a cat at 0.75 m/s and, at 1.25 m from his mouse hole, he accelerates at a constant rate of 0.25 m/s2 until he reaches his hole safely. How long a time was required for him to cover the last 1.25 m?
When Philippe Petit was in the middle of the wire between the World Trade Center Towers the wire depressed 1 ft. If during his 40 minutes of tricks the wire began to oscillate up and down from this equilibrium position by 6 inches, where is his ki..
The position function x(t) of a particle moving along an x axis is x = 4.5 - 4.5t2, with x in meters and t in seconds.
A loudspeaker of mass 20 is suspended a distance of 2 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of 2.90.
A 400 kg car sits 2 m to the right of a fulcrum assume car is on a weightless rod, how far to the left of the fulcrum should an effort of 200 N be applied to keep the system in quilibrium.
Calculate the angular momentum of the Earth about its own axis, due to its daily rotation. Assume that the Earth is a uniform sphere
A microscope has an objective that has a focal length equal to 6.6 mm. what is the laternal magnification of the objective
A spaceship of proper length 306 m takes 0.70 µs to pass an Earth observer. find the speed of this spaceship as measured by the Earth observer.
Calcualte the radiation dosage (in rads) for a 67-kg person that is exposed to 6.0 seconds to a 3.0 Ci source of beta radiation.
For nitrogen gas at 35 C calculate the vrms, the vp and the translational kinetic energy
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