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A laser emits a single, 2.0-ms pulse of light that has a frequency of 2.83 ´ 1011 Hz and a total power of 75 000 W. How many photons are in the pulse?
q1. a rifle with a barrel length of 60 cm fires a 12 g bullet with a horizontal speed of 360 ms. the bullet strikes a
A pair of speakers separated by 0.900 m is driven by the same oscillator at a frequency of 672 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers. (Assume the spe..
Two space walkers, one with a mass of 77 kg and the other with a mass of 78 kg, hold on to the ends of a lightweight cable 14.5 m long. how far will the less massive astronaut move
An artificial satellite circles the Earth in a circular orbit at a location where the acceleration due to gravity is 4.50 m/s2
A very thin bubble is floating in air. If the bubble strongly reflects green light (? = 520 nm), what is the minimum possible thickness of the bubble
A woman on a bridge 86.8 m above a stream sees a bottle floating along at a constant speed. Calculate the speed of the bottle
A Carnot engine takes an amount of heat QH = 111 J from a high-temperature reservoir at temperature TH = 1030 °C, Find the amount of work that is obtained from this process
Water flows out of a shower in a typical house at a rate of 20 liters/min. what is the difference between the pressure in the tank and atmospheric pressure
A truck driver is broadcasting at a frequency of 33.103 MHz with a CB (citizen's band) radio. Determine the wavelength of the electromagnetic wave
The bar is held by a cord that makes a 90? angle with respect to bar and 50 ? with respect to wall. Illustrate what is the magnitude of the horizontal force Hx on the pivot? The acceleration of gravity is 9.8 m/s2.
When a 21 ohm resistor is connected to a battery that has a 7 ohm internal resistance the terminal voltage of the battery is 9 V. Determine the emf of the battery
An obnoxious brat assigns his 18.7-gram pet mouse Mickey the role of stunt mouse by stuffing him into a spring gun and shooting him up into the air at some angle. How high above his initial location in the gun does Mickey soar
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