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1.) A mixture of yellow light (wavelength = 582 nm in vacuum) and violet light (wavelength = 414 nm in vacuum) falls perpendicularly on a film of gasoline that is floating on a puddle of water. For both wavelengths, the refractive index of gasoline is n = 1.40 and that of water is n = 1.33. What is the minimum nonzero thickness of the film in a spot that looks the following colors because of destructive interference?
a.) yellowb.) Blue
2.) Light of wavelength 626 nm (in vacuum) is incident perpendicularly on a soap film (assume n = 1.36) suspended in the air. What are the two smallest nonzero film thicknesses (in nm) for which the reflected light undergoes constructive interference?
a.) Smallestb.) Next smallest
A 135 mCi radioactive tracer is made in a nuclear reactor. When it is delivered to a hospital 18 hours later its activity is 85 mCi. The lowest usable level of activity is 10 mCi. What is the tracer's half-life
A horse draws a sled horizontally across a snow-covered field. The coefficient of friction between the sled and the snow is 0.175, and the mass of the sled, what is the power needed to accomplish this
A person walks first at a constant speed of 4.50 m/s along a straight line from point circled A to point circled B and then back along the line from circled B to circled A at a constant speed of 2.85 m/s. What is her average speed over the entire t..
A UFO flies directly over a football stadium at a speed of.50c. If the proper length of the field is 100 yards, what field length is measured by the crew of the UFO
A circuit contains six 290 lamps and a 18 heater connected in parallel. The voltage across the circuit is 120V. If the circuit has a 11A fuse, will the fuse melt if all the lamps and the heater are on.
Two capacitors are in a series. C1=150nF and C2=120nF. The potential difference across them is 36 volts. Find the total energy stored in the network
A rocket is fired straight up and accelerates upward at 12 m/s2 for 18 seconds. The rocket then runs out of fuel and coasts still going up. Ignore any air resistance effects on the rocket and use -9.8 m/s2 for the local acceleration due to gravity..
A bumper car with mass m1 = 115kg is moving to the right with a velocity of v1 = 4 m/s. A second bumper car with mass m2 = 95 kg is moving to the left with a velocity of v2 = -3.7 m/s. The two cars have an elastic collision. Suppose the surface is fr..
A horizontal force of 150 N is used to push a 45.0 kg packing crate a distance of 5.10 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150 N force _________J (b) the coeffici..
Assume that a 16 volt energy source is in a circuit that has a resistance of 10 ohms. Determine the current and power
In a certain particle accelerator, protons travel around a circular path of diameter 20.5 m in an evacuated chamber, What is the mean free path of the gas molecules
A 0.19-kg stone is held 1.4 m above the top edge of a water well and then dropped into it, What is the change in gravitational potential energy of the system from release to reaching the bottom of the well
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