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Problem 1: A current of 22 ?A was passing through a wire.
Part (a) Express charge Q passing through the wire in terms of the current I and the time interval Delta t.
Part (b) In a time interval of Delta t = 54 s, how much charge has passed through the wire in ?C?
Problem 2: The filament of an incandescent light bulb is made of tungsten which has a thermal coefficient of resistivity of ? = 4.4 x 10-3K-1. The filament is initially at room temperature, To = 293 K. When it is connected across a V = 80 volt power supply the filament quickly heats up to T = 2700 K at which time the current flowing through the filament is I = 0.65 Amps.
Part (a) Write an equation for the initial current, I0, that flows through the filament when it is initially turned on. (e.g., when it is still at room temperature).
Part (b) Find the numerical value of the current in amps when the filament is at room temperature.
A 110 ball and a 250 ball are related by a 38--long, massless, rigid rod. The balls rotate about their center of mass at 150 what is the speed of the 110 ball.
A projectile is fired horizontally from a gun that is 47.0 m above flat ground; emerging from the gun with a speed of 250 m/s.
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On a banked race track, the smallest circular path on which cars can move has a radius of 112m, while the largest has a radius of 165m, as the drawing illustrates. The height of the outer wall is 18m. The largest speed at which cars can move on thi..
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