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The resistance of a wire increases 3.9% when the temperature of the wire is raised 100°C. What is the temperature coefficient of resistivity of the wire material?
A train is travelling up a 4.5 degree incline at a speed of 3.25 m/s when the last car breaks free and begins to coast without friction. a) How long does it take for the last car to come to rest momentarily? b) How far did the last car travel befo..
a 71 kg baseball lplayer jumps straight up to catch a line drive. If the 140 g ball is moving horizontally at 28 m/s and the catch is made when the ball player is at the highest point of his leap what is his speed immediately after stopping the ba..
Charge is placed on two conducting spheres that are very far apart and connected by a long thin wire. Find the surface charge density on each sphere
A 13 g bullet traveling 217 m/s penetrates a 2 kg block of wood and emerges cleanly at 153 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges.
A bottle has a mass of 35.00 g when empty and 98.44 g when filled with water. When filled with another fluid, the mass is 88.78 g. What is the specific gravity of this other fluid
A mass spectrometer has an adjustable magnetic field. When themagnetic field is 7.000e-2 T, a singly ionized hydrogen atom (a proton) will strike the detector at a particular location. Suppose a triply-ionized carbon 12 atom, whose mass is by defi..
Compiute the average power output in horsepower. Calculate assuming the body is 14% efficient, what rate of energy input was required.
Consider the posiblity of making a LED from diamond by constructing a pn junction from a diamond doped with boron and a diamond doped with phosphorus. Estimate the wavelength of the light emitted.
A 28 mH inductor in series with a resistance of 35 omegacap.gif is connected to a source whose voltage is script E = 340 V cos 150?t, Determine the average power dissipation
A 142Kg create is placed on an inclined ramp. when the angle the ramp makes the horizontal is increased to (alfa), the crate beging to slide downward.
The springs of a 1500kg car compress 6.0mmwhen its 61kg driver gets into the driver's seat. what will be the frequency of oscillations
a bowling ball has a mass of 7.2 kg and radius of 0.11m. a billiard ball has a mass of 0.38 kg and a radius of 0.028 m.
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