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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?
A red blood cell typically carries an excess charge of about -2.5 × 10-12 C distributed uniformly over its surface. How many excess electrons does a typical red blood cell have
During 0.27 s, a wheel rotates through an angle of 2.20 rad as a point on the periphery of the wheel moves with a constant speed of 2.69 m/s
A source delivers an AC voltage of the form ?v = 96.2 sin (66?t), obtain the frequency of the source
For a common emitter amplifer, current gain is 70. If the emitter current is 8.8mA, Calculate the collector and base current. Also calculate current gain
Two blocks are travelling towards eachother. The first has a speed of 10cm/sec and the second has a speed of 60 cm/sec. compute the velocity of the first block after collision
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of -0.6311 N when separated by 50 cm, center-to-center, What are the smaller and larger values
a small motor draws a current of 1.75 A from a 120.0 V line. It costs $35.81 to operate the motor for 4.00 hrs at $0.0600 /kWh. What is the power output of the motor
The lowest pedal note on a large pipe organ has a fundamental frequency of 16 Hz, What is the length of the open-closed pipe that makes that note
Assume the mass of the beam is negligible when compared with the mass of the floodlight. Find out the force FT provided by the cable. The acceleration of gravity is 9.81 m/s2 .
What is the mass of the rim.
(a) Determine the distance of the final image relative to the converging lens. (b) What is the height of the final image (including the proper algebraic sign)?
A certain lightbulb is rated at 165 W when operating at an rms voltage of 1.5 V. What is the peak voltage applied across the bulb
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