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Question: A radiation detector exposed to sunlight records the energy falling on a given area each minute. The detector shows 2.92 J cm-2min-1. How many photons are striking each cm2 in 1.0 minute? Assume the wavelength of sunlight absorbed is 460 nm.
two masses m1=2.0kg and m2=3.5kg are connected by a thin string running over a massless pulley. what is the acceleration of the masses
What is the value of the inductance L so that the above circuit carries the largest current? what is the impedance seen by the voltage source
A wooden block with mass 0.33kg rests on a horizontal table, connected to a string that hangs vertically over a friction-less pulley on the table's edge, Find the block's acceleration if k =0.18.
The minimum-wavelength X-ray produced by a certain X-ray tube is 0.283 nm. Find the minimum voltage applied to the tube
A23.0-mW laser beam of diameter1.85mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
Most of the galaxies in the universe are observed to be moving away from Earth. Suppose a particular galaxy emits orange light with a frequency of 5.000 \times 10^{14} {\rm Hz}. If the galaxy is receding from Earth with a speed of 3725{\rm km/s} , wh..
question1a 71.0 person holds his arms so that his hands are 1.80 apart. typically a persons hand makes up about 1.00 of
Two 1.7 kg masses are 1.7 m apart on a frictionless table. Each has +1.1 µC of charge. What is the initial acceleration of the mass if it is released and allowed to move
A parallel-plate capacitor with circular plates of radius R is being discharged. What is the discharging current
A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 590 N. Determine the magnitude of acceleration of the elevator
A 0.20-kg object attached to the end of a string swings in a vertical circle (radius = 80 cm). At the top of the circle the speed of the object is 4.5 m/s. What is the magnitude of the tension in the string at this position?
An artificial satellite is moving in a circular orbit with a speed of 6.3 km/s and a period of 84.0 min. What is the acute angle between the radius vector and the total acceleration of the satellite
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