A laser emits a single 20-ms pulse of light that has a
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?
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a centripetal force of 235 n is experienced by a mass of 123 g as it is spun in a circular path with a radius of 250
a weather balloon is designed to expand to a maximum radius of 24 m at its working altitude where the air pressure is
block 1 has mass m1 470 g block 2 has mass m2 510 g and the pulley is on a frictionless horizontal axle and has
for a charged hollow metal sphere with total charge q and radius r centered on the originselect trueor false for each
a laser emits a single 20-ms pulse of light that has a frequency of 283 acute 1011 hz and a total power of 75 000 w how
a sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 k to 383 k if 250 j of work is
an archeological specimen containing 92 g of carbon has an activity of 16 bq how old in years is the
the electric field just above the surface of the charged hollow drum of a photocopying machine has a magnitude e of30e5
a the elevator begins to accelerate at 15ms2 what is his apparent weightb the elevator continues to move upwards with a
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