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A powerful laser can emit in 0.56x10-2 s anintense pulse of light having an energy of 4500 J. If thefrequency of the light is 6.07x1014 Hz, how many photons will be emitted in this pulse.
Two heat reservoirs at temperatures 190°C and 60°C, respectively, are brought into thermal contact, What is the change in the entropy of the two-reservoir system
A nozzle of inner radius 1.05 mm is connected to a hose of inner radius 7.96 mm. The nozzle shoots out water moving at 25.5 m/s. What is the volume flow rate
During normal operation, a computer's hard disk spins at 7200 rpm. what is the average angular acceleration of the hard disk
a loaded cart has a total mass of 227kg.if a 312n force acting at an angle of 30degree to the ground is applied. how
compute the linear speed due to the Earth's rotation for a person at a point on its surface located at 40o N latitude (this would be near the Ohio river valley, for instance). The radius of the Earth is 6.40 ξ 106 m. (For comparison, the speed of ..
A convex mirror with a focal length of 0.25 m forms a 0.081 m tall image of an automobile at a distance of 0.23 m behind the mirror
Explain why you think the Petroleum Marketing Practices Act was not passed until 1979 even though gasoline service station franchise arrangements had been in existence for decades before 1979.
A firehose 15 m long is uncoiled by pulling the nozzle end horizontally along a frictionless surface at the steady speed of 2.9 m/s. How much work has been done on the hose by the applied force
A balloon contains 10 lbs of Helium at a temperature of 70 ?F. If the volume of the balloon is 300 ft3, what is the pressure of the balloon
Rock 1 is thrown straight down from a tower. Rock 2 is thrown straight up from the same height at the same speed as rock 1. find which rock will have the greatest speed
A current of 38.9mA flows in a silver wire of diameter 3.33 mm. Find the electric field strength inside the wire
A string passes over a frictionless pulley and connects a 250 g block to 2.00 kg block. The inclines are frictionless. Assuming you release both masses from rest, how much time would it take the 250g to travel 2200cm next to the ramp.
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