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When a beam of white light is incident (vertically) on a thin oil slick (n = 1.25) floating on water, the only enhanced (bright, constructively interfering) colors in the reflected beam are red (wavelength = 675 nm in air) and violet (at 450 nm). What is the thickness of the oil slick?
Stars, to a good approximation, are spherical, and emit electromagnetic radiation from a surface of emissivity e = 1. What is the diameter (in millions of km) of this star
A layer of transparent plastic (n = 1.63) on glass (n = 1.52) looks dark when viewed in reflected light whose wavelength is 576 nm in vacuum. Find out the two smallest possible nonzero values for the thickness of the layer.
A 78-kg fisherman in a 137-kg boat throws a package of mass m = 15 kg horizontally toward the right with a speed of vi = 4.0 m/s, find the velocity of the boat after the package is thrown
A container of hot water at 80 degrees cools to 79 degrees in 15 seconds while it is placed in a room that is t 20 degrees. Use newton's law of cooling to estimate the time it will take for the container to cool from 50 degrees to 49 degrees.
The quartz crystal in a digital watch has a frequency of 32.8 kHz. What is its period of oscillation?
The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening position increases from 21 to 59 dB. What is the ratio of the final sound intensity to the original sound intensity?
If the loop's diameter changes from 24.0cm to 5.8cm in 0.67s , what is the direction of the induced current, If the coil resistance is 2.6? , what is the average induced current
A driver traveling at 72 km/hr sees an animal dash out onto the road and slams on the brakes. What was the driver's reaction time
An automobile traveling at 40.0 km/h has tires of 50.0 cm diameter. How far does the car move during the braking
A child's water pistol shoots water through a 1.8 mm-diameter hole. If the pistol is fired horizontally 78 cm above the ground, the squirt hits the ground 1.8 m away. What is the volume flow rate through the squirt? Ignore air resistance.
Consider a hoop of mass 2.1 kg and radius 0.57 m that rolls without slipping down an incline. What forces act on the hoop
What is the diameter of an air-filled coil with a 44 mH inductance, if it has 290 turns and the length of the coil is 76 cm
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