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A soap film whose index of re%uFB02ecetion is 1.33 is suspended in air. When sunlight strikes the film nearly perpendicularly, two colors, %u03BB1=391 nm and %u03BB2=667 nm, look bright in the reflected light due to constructive interference. No other color is observed. Find the thickness of the film.
A body in free fall reaches the ground in 5 s. From what height in meters was it dropped
A plane drops a package of food to stranded caribou on an ice flow in the Artic circle. How far short of the target should it drop the package
Two capacitors, C1 = 30 µF and C2 = 4.0 µF, are connected in parallel and charged with a 110 V power supply. Calculate the total energy stored in two capacitors
Three 15-? resistors are connected in parallel. This arrangement is connected in series with a 10-? resistor. What is the effective resistance of the parallel portion of the circuit
What harm, if any, would occur by rotating the spectacle lenses of a near-sighted person in their frames? What if the individual had an astigmatic correction
The moment of inertia of a uniform ring is I (r) = M (r) * R^2 (r), where M (r) and R (r) denote the mass and radius of the ring. Compute the moment of inertia of this disk
A 4.00 kg block is free from rest 2.0m high at the top of a 30 degree frictionless incline. The block makes a head-on elastic collision with another 3.00 kg block initially at rest on a horizontal surface at the bottom of the incline.
Each tire of an automobile has an area of 0.026m^2 in contact with the ground. The weight of the automobile is 2.6x10^4 N. What is the pressure in the tires.
How much energy is transferred to the water as heat
You want to practice zero g, i.e. not feeling any gravity. What velocity (ft/s) is required to cancel gravity at the top of the circle
The mass of the barge is 9000 kg, and its acceleration is 0.15 m/s2 down the canal. Illustrate what are the magnitude and the direction of the force on the barge from the water?
a diver runs horizontally with a speed of 1.2 m/s off a platform that is 5.0 m above the water. What is the speed just before striking the water
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