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A human hair is placed directly in front of the opening of a laser pointer. The light has a wavelength of 647.8 nm. On a screen 2.0 m in front of the laser, a diffraction pattern is observed with minima spaced 0.0164 m apart. Determine the approximate thickness of the hair.
A device used in radiation therapy for cancer contains 0.38 g of cobalt-60 (59.933 819 u). Determine the activity (in Bq) of the radioactive material
You see lightning strike a mountaintop, and 2.98 s later you hear the accompanying thunder. How far away is the mountaintop
A 0.80 kg mass is attached to a light spring with a force constant of 23.9 N/m and set into oscillation on a horizontal frictionless surface. determine maximum speed of the oscillating mass
Assume you are a medieval knight attacking a castle with a cannon. The cannonball leaves the cannon with a speed of 40.7 m/s, What is the time of flight of the cannonball
A hydrogen atom initially in the ground state absorbs a photon, which excites it to the n = 12.0 state. Determine the frequency of the photon
How many homes could be heated with the waste heat
Assuming the sun to be a blackbody with a surface temperature of 6000K, Determine the loss in solar mass per day due to this radiation
To stop a car, first you require a certain reaction time to begin braking; then the car slows under the constant braking deceleration. What is your reaction time
You have a thin lens with a focal point at 1.7 cm. If you place a candle stick at a distance of 3.9 cm from the center of the lens, calculate the distance of the resulting image from the lens
a boeing 747-8 with wingspan of 65.5 m is cruising at 289 m/s over northern canada, What is the potential difference between the tips of the wings
A microwave oven is powered by an electron tube called a magnetron, which generates electromagnetic waves of frequency 3.46 GHz. determine the speed of the microwaves
A small car with mass 0.690 travels at constant speed on the inside of the track that is a vertical circle with radius 5.00. If the normal force exerted by the track on the car when it is at the top of the track (point) is 6.00, what is the normal fo..
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