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A silicon solar cell looks like a battery with a 0.48V terminal voltage. Suppose that 1.0 W of light of wavelength 640nm falls on a solar cell and that 50% of the photons give their energy to charge carriers, creating a current. What is the solar cell's efficiency-that is, what percentage of the energy incident on the cell is converted to electric energy?
An electron and a proton are each placed at rest in a uniform electric field of magnitude 546 N/C. Compute the speed of each particle 52 ns after being free.
The following two traveling waves are super posed to create at standing wave: What is the resulting amplitude of the standing wave
What is the shortest height a plane mirror must be so that a person who is 1.6 meters tall is able to see his or her whole body? plan a ray diagram to support your answer.
You have decided to make a large cooler to store meat. Calculate the net rate of heat flow per second out of the cooler if the interior temperature is 5 C and the exterior temperature can be 45 C
However, as the drawing shows, a plane mirror reflects light from the bird into your camera. If x = 4.2 m and y = 3.9 m in the drawing, for what distance must you set focus of the camera lens in order to snap a sharp picture of the bird's image.
A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed, What is the magnitude of the tension in the string when the ball is at the bottom of the circle
A freight car with a mass of 2500 kg rolls down an inclined track through a vertical distance of 1.5m. at bottom of the incline, on a level track, the car collides and couples with the identical freight car that was at rest. What percentage of th..
The energy imparted to an electron as it moves through a potential of magnitude V is eV, where e is the charge on an electron. How do you find theoretical value for the slope of your line
How many liters of gasoline would give the same mechanical energy given that each liter provides 8.50x10^6 J of mechanical energy.
A uniform magnetic field passes through a horizontal circular wire loop at an angle 16.2° from the normal to plane of the loop. compute the magnetic flux through the loop
A damped mass-spring system oscillates at 140 Hz. The time steady of the system is 2.0 s. At t = 0, the amplitude of oscillation is 8.6 cm and the energy of the oscillating system is after that 86 J.
Consider a constant net force of 15.0 N acting on 22 degrees below the x-axis, find the work done by the net force.
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