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A thin film of MgF2 (n = 1.38) coats a piece of glass. Constructive interference is observed for the reflection of light with wavelengths of 400 nm and 600 nm .
A potter's wheel -- a thick stone disk of radius 0.500 m and mass 120 kg -- is freely rotating at 50.0 rev/min. The potter can stop the wheel in 6.00 s by pressing a wet rag against the rim and exerting a radially inward force of 63.0 N. Find the eff..
A beetle 4.80mm is examined with magnifier of focal length 10.3 cm. If the observer's eye is relaxed while using the magnifier, what is the apparent length of the beetle
You dip your finger into a pan of water twice each second,producing waves with crest that are separated by 0.11 m. Determine the frequency of these waves
The surface of the Sun is approximately at 5700 K, and the temperature of the Earth’s surface is approximately 280 K. What entropy change occurs when 860 J of thermal energy is transferred by heat from the Sun to Earth?
1. the water cooling system in a car engine that carries hot water from the engine block to the radiator is an example
A square loop of wire with sides of length l=0.15m is pulled horizontally to the right at a constant speed of 5.0m/s into a perpendicular magnetic field of strength B=0.37T directed into the page
One wire carries a current of 5.008 A into it. Another wire carries a current of 5 A out of it. Explain how long would it take for the sphere to increase in potential by 4000 volts?
The centers of a 14kg lead ball and a 50g lead ball are separated by 11cm What gravitational force does each exert on the other?. What is the ratio of this gravitational force to the weight of the 50g ball?
A 2.6k and a 1.8k resistor are connected in parallel and this combination is connected in series with a 1.8k resistor. If each resistor is rated at 1/2W, what is the maximum voltage that can be applied across the whole network.
What thickness of board (calculated to 0.1 cm) would it take to stop the bullet, suppose that the acceleration through all boards is the same.
Suppose the space shuttle is in orbit 590 km from the Earth's surface, and circles the Earth about once every 90 min. Find the centripetal acceleration of the space shuttle in its orbit
a parallel plate capacitor has a capacitance of 7uf when filled with a dialectric. the area of each plate is 1.5 square
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