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A nonreflecting single layer of a lens coating is to be deposited on a lens of refractive index n=1.78. Find the refractive index of a coating material and the thickness required to produce zero reflection for light of wavelength 550 nanometer.
Runner A is at first 5.4 km west of a flagpole and is running with a constant velocity of 2.6 km/h due east. Runner B is initially 3.0 km east of the flagpole and is running with the constant velocity of 8.8 km/h due west. What would be the distance ..
A radioactive isotope has an activity of 8.39 mCi. After 3.30 hours the activity is 6.71 mCi. What is the half-life of the isotope
a chain is held on a frictionless table with 1/5 of its length hanging over the edge. how much work is required to pull the hanging part back
A series ac circuit is shown. The inductor has a reactance of 80 Omega and an inductance of 200 mH. A 90- Omega resistor and a capacitor whose reactance is 130 Omega , are also in circuit. The rms current in the circuit is 1.3A. What is the phase ..
a toy airplane moves at the end of a string about a fixed point in a horizontal circle of 1.02-m radius. if the linear
A steel section of the Alaskan pipeline had a length of 65 m and a temperature of 12°C when it was installed. What is its change in length when the temperature drops to a frigid -38°C?
A 120-V rms voltage at 1000 Hz is applied to a series LRC circuit with an equal value of inductive and capacitive reactance and a 200-? resistance. What is the impedance of this circuit
A passenger walks from one side of a ferry to the other as it approaches a dock. What is the direction of the ferry's velocity relative to the water
A relief airplane is delivering a food package to a group of people stranded on a very small island. After a package is ejected from the plane, how long will it take for it to reach sea level from the time it is ejected
A 518- physics student stands on a bathroom scale in an 846- (including the student) elevator that is supported by a cable. As the elevator starts moving, the scale reads 464. Find the magnitude of the acceleration of the elevator
Given the Sun's distance from the center of the Milky Way and the Sun's period of revolution, how can we determine a lower bound for the mass of the Milky Way galaxy?
If a block of wood floating on a pool of water has a volume of 37 cm3anddisplaces a volume of waterof 30 cm3, what is the densityof the wood
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