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Lasers can be utilized to drill or cut material. One such laser generates a series of high-intensity pulses rather than a continuous beam of light. Each pulse contains 500mJ of energy and lasts 9.0ns. The laser fires 10 such pulses per second.
a) A lens focuses the laser beam to a 10 m diameter circle on the target. Through a pulse, what is the light intensity on the target?
b) The intensity of sunlight at the surface of the earth at midday is about 1100 W/m2. What is the ratio of the laser intensity on the target to the intensity of the midday sun?
A model rocket launches with an initial velocity of 7 m/s, at an angle of 81 degrees (with respect to the horizon). How far does the rocket travel in the horizontal direction
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three resistors are connected in series across a battery. the value of each resistance and its maximum power rating are
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