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An athlete loses 6.5 MJ of heat during a strenuous exercise period. Work efficiency is 20%. If the athleteconsumes enough food to maintain a fixed internal energy and temperature, what is the energy intake in MJ?
A 40 ton truck loses it brakes and reaches the bottom of a hill with a speed of 77 mph. Assuming no losses, what distance does the truck travel along the runaway truck ramp
You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7N. What is the magnitude of the force that Earth exerts on the bag.
Two 27.0 cm focal length converging lenses are placed 16.5 cmapart. An object is placed 35.0 cm in front of one. What is the total magnification
A source of light, spreading out radially froma point source produces a sinusoidal electric field of amplitude of 6.88 V/m at a radial distance of 42.0m from the source. We want to determine the power output form the source. Write an equation rela..
A 200-turn rectangular coil having dimensions of 3.0 cm by 6.0 cm is placed in a uniform magnetic field of magnitude 0.98 T. Find the current in the coil if the maximum torque exerted on it by the magnetic field is 0.23 N · m.
A toroid having a 7.2 cm square cross section and inside radius of 22.8 cm has 170 turns of wire and carries a current of 1.8 A. What is the magnetic flux through the cross section
dnp dinitrophenol is a compound that allows hydrogen ions to leak across a membrane. this leakage prevents the
Write an expression for a R -state lightwave of angular frequency wand amplitude E0 propagating in the positive x-direction such thatat t=0 and x=0 the E-field points in the negative z-direction.
A heat pump uses an ideal Carnot cycle to heat a house. The outside air has a temperature of 292 K, What is the coefficient of performance of this heat pump
The question states: two large, parallel conducting plates are 12cm apart and have charges of equal magnitude and opposite sign ontheir facing surfaces. find the elctric field at the position of the elctron
A body of mass 2.1 kg makes an elastic collision with another body at rest and continues to move in the original direction but by one-fourth of its original speed. What is the mass of the other body? What is the speed of the two-body center of mass i..
A 1200 pF capacitor is changed by a 500 V battery. It is disconnected from the battery and at t=0 connected to 75 mH inductor. Determine the maximum current in the circuit
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