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The potential difference across the filament of a light bulb is kept constant while the filament heats up to its final equilibrium temperature. The current in the filament drops to a tenth of its original value at room temperature. If the temperature coefficient of resistivity of the filament is 0.0045 (oC)-1 and the resistivity increases linearly with temperature, find the final temperature of the filament.
A plane normally takes 10 hours to travel 5, 500 miles. One day significant headwinds slow the plane down, how long will the entire trip take
calculate the Doppler shift (the difference of the observed and emitted frequencies) for light from a car moving toward you at a speed of 210 m/s
a 10.7g object moving to the right at 18.3 cms makes an elastic head-on collision with a 16.2g object moving in the
The water is near freezing in temperature. Typically a human can only swim in such water for about 300 seconds (or 5 minutes) before hypothermia sets in. Calculate the time the explorer spends in the water
A spring is hung from the ceiling. A 0.322 -kg block is then attached to the free end of the spring. Find the angular frequency of the block's vibrations
In the Bohr model of the hydrogen atom, an electron in the 6th excited state moves at a speed of 6.08 104 m/s, What is the effective current associated with this orbiting electron
A typical scuba tank has a volume V of 10 liters. When fully charged, it contains compressed air at a pressure of 200 bars, or 2.0 x 10^7 Pa. What is the uncompressed volume of the air
The radius of the orbit is 3.7 x 104 km as measured from the center of the Earth. find the weight of the satellite on the surface of the Earth
A 12 Volt battery remains connected to a parallel plate capacitor with a plate area of 0.294 m2 and a plate separation of 5.24 millimeter. Determine how much energy is stored in the capacitor
a proton experiences an electric force of 95.2 fn 1 fn 1 fem to newton 1e-15 n in a uniform electric field. how
A sealed glass jar contains air originally at a pressure of 1.00atm and a temperature of 0° C. Discover the air pressure when the jar is heated to 310° C. The linear expansion coefficient of the glass is 1.03*10-5 (C°)-1.
A lens with a focal length of 25 is placed 40 in front of a lens with a focal length of 5.0. How far from the second lens is the final image of an object infinitely far from the first lens? Is the image in part a in front of or behind the second l..
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