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A thin film of water sits on top of a flat piece of glass; and light is incident from below (see the subsequent figure). If the angle of incidence is θ = 20°, what is the angle of refraction of the final outgoing ray?
A Carnot engine is operated between two heat reservoirs at temperatures of 300K and 400K.
A note played on a piano is 4719 Hz. If the speed of sound is 347 m/s, what is the wavelength of the note?
A car (m = 700.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a height, h = 42.0 m. Find the average power the engine must deliver to reach a speed of 20.3 m/s at the top of the hill in 24.5 s
A person with a mass of 71.6 kg and a volume of 0.089 m3 floats quietly in water. (a) What is the volume of the person that is above the water?
A certain laboratory experiment requires an aluminum wire of length of 36.0 m and a resistance of 2.80 ? at 20.0°C. What diameter wire must be used
A river steamboat travels 36 miles downstream in the same time that it travels 24 miles upstream. What is the currents speed
Suppose you have an electric hot water heater for your house which is an aluminum cylinder which has a 0.44 m radius and is 1.8 m high. The walls are 1.0 cm thick.
Estimate the force P to accelerate the 80 - Ib block at 6ft/sec2 to the right.
A driver applies a horizontal force of 20 N (to the right) to the top of a steering wheel. Calculate the angular acceleration of the steering wheel about the central axis
A volleyball is spiked with initial velocity of10.5 m/s. The ball is directed downward at angle of 53.9 degreesbelow horizontal. What is the horizontal component of the balls velocity
A merry go round at a children's playground can be approximated as a uniform circular disc with a diameter of 3.72 m and a mass of 288 kg. A constant force of 178 N is applied perpendicular to the outer edge of the merrygoround. How long does it t..
An electromagnetic wave in a vacuum has a maximum magnetic field amplitude of 5.67×10?7 T. What is the maximum electric field amplitude of the wave
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