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1. A solar cell generates a potential difference of0.0806 V when a 500 Ω resistor is connected acrossit, and a potential difference of 0.1241 V when a 1000Ω resistor is substituted. What is the internal resistance of the solar cell?
2. What is the emf of the solarcell?
3. The area of the cell is 5.0cm2, and the rate per unit area at which it receives energy from light is 2.0m W/cm2. What is the efficiency of the cell for converting the light energy to thermal energy in the 1000 Ωexternal resistor? (percent = Do not enter a unit)
Halleys comet, which passes around the sun every 76 years, has an elliptical orbit. When closest to the sun (perihelion) it is a distance of 8.823 x 10^10m, calculate its speed at aphelion
A converging lens of focal length 0.25 m forms a virtual image of an object, What is the distance between the object and the lens
According to recent test data, an automobile travels 0.250 mi in 19.9 s, starting from rest. The same car, when braking from 60.0 mi/h on dry pavement, stops in 146 ft. Find the acceleration of this car when it is braking
An oscillating LC circuit has a current amplitude of 7.50 mA, a potential amplitude of 250 mV, and the capacitance of 220 nF. What are (a) the period of oscillation.
two identical wheels are moving on horizontal surfaces. the center of mass of each has the same linear speed. however
You and your friend are practicing pass plays with a football. You throw the ball at 35 degrees above thehorizontal at 19 m/s.
Two identical conducting spheres, fixed in place, attract each other with a force of 0.084 N when their center to centerseparation is 40.00 cm. The spheres are then connected by a thin conducting wire.
An oxygen bubble at the bottom of a lake 20. m deep has a volume of 1.20 cm^3, calculate the initial pressure inside the bubble at the bottom of the lake
A cannon with mass of 2000kg fires a 10kg shell at an angle of 60 degrees above the horizontal. what is the velocity of the cannon ball
a 3-kg cart moving to the right with a speed of 5.9 ms has a head-on collision with a 5-kg cart that is initially
A wooden shelter has walls constructed of wooden planks 1.00 cm thick. find the rate of energy loss through a wall that has dimensions 1.85 m by 2.10 m
An object is in front of a converging lens with a focal length of 11.0 cm. The lens produces a real image located 25.0 cm from the lens. what is the image distance of the new lens
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