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In an effort to pump up you decide to hit the gym and lift weights everyday of the week. Your favorite lift, which you per- form every trip to the gym, is the bench press. This lift involves lifting a 125 lb. weight straight up from chest height to full arm extension, a distance of 20 inches.
(a) How much work is done on the weight to lift it one time?
(b) If you do 3 sets of 10 in a day, what total energy do you expend on lifting, assuming a typical efficiency for energy use by the body?
(c) How many 400 Calorie jelly donuts can you eat each day to supply that energy?
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a 1.91-kg solid sphere radius 0.130 m is released from rest at the top of a ramp and allowed to roll without
develop a hypothesis for how kernel color is inherited . the hypothesis should includea number of genes involvedb
A particular nucleus of the element plutonium contains 94 protons and 150 neutrons. What is the magnitude of the force from the nucleus on a single electron that is at a distance of 0.563 × 10-12 m from the plutonium nucleus.
At one instant a bicyclist is 35.0m due east of a park's flagpole, going due south with a speed of 20 m/s. Then, 19 s later, the cyclist is 60.0 m due north of the flagpole, going due east with the speed of 11 m/s. For the cyclist in this 19s inte..
The wire is cut at point P. Will the potential difference between points A and B increase, decrease, or remain the same? Give reason for.
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a 25 kg child on a 2m long swing is released from rest when the ropes of the swing make an angle of 25 degrees with the vertical, neglecting friction, find the childs speed at the lowest position
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A lever uses an effort arm of 4.75 m and has a resistance arm of 21.5 cm. What is the mechanical advantage of the lever
A jetliner is moving at a speed of 189 m/s. The vertical component of the plane's velocity is 37.6 m/s. Determine the magnitude of the horizontal component of the plane's velocity.
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