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When a silicon solar cell was irradiated with monochromatic light of 8.50 mW/cm2, it showed short circuit photocurrent density of 3.00 mA/cm2. Find at which wavelength the monochromatic light was irradiated. The external quantum efficiency was 65%.
An electron is accelerated through 2.85 103 V from rest and then enters a uniform 2.40-T magnetic field. What is the maximum magnitude of the magnetic force this particle can experience
Consider two disks of the identical mass rotating about their axes. Disk C has twice the radius of disk D. Find the ratio of the moment of inertia of disk C to that of disk D
A person with a near-point distance of 29 cm is able to get a usable magnification of 12 with a particular magnifying glass. What is the friend's near-point distance
You hang different masses M from the lower end of a vertical spring and measure the period T for each value of M. What is the force constant k of the spring? What is the mass of the spring?
Two point particles of charge Q1 = 43 µC and Q2 = 89 µC are found to have a potential energy of 38 J. What is the distance between the charges
The cube shown in the figure below, 50.0 cm on a side, is in a uniform magnetic field of 0.140 T, directed along the positive y-axis. Wires A, C and D move in the directions indicated, each with a speed of 0.350 m/s. What is the potential differenc..
A car goes over a circular bump in the road with a radius of 30 meter at a speed of 15 m/s. Determine the apparent weight of a passenger in the car
A meter stick supported at the 50 cm mark has masses of 300 g & 200 g hanging from it at the 10-cm & 60-cm mark, respectively. Where should we hang a third, 400-g mass to keep the meter stick balanced?
Two point objects both having mass M are placed at positions (0,yM0) and (0,-yM0) in the 2D Cartesian coordinate system and cannot move. Find the total potential energy of the system
A spherical balloon is partially blown up and its surface area is measured. More air is then added, increasing the volume of the balloon. If the surface area of the balloon expands by a factor of 6.7 during this procedure, by what factor does the ..
what is the normal force on the box?
Suppose that by stirring 854 g of water you are able to increase its temperature from 19 degrees C to 21 degrees C. Find the increase in the water's entropy
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