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For charging process, the voltage across the capacitor as a function of time is given by Vc = ε[1-exp(-t/τ)]
a) When the time is twice the time constant, find what percentage of the maximum voltage is on the capacitor?
b) Compute the time it took in terms of the time constant, for the voltage across the capacitor to be 30 percent of the maximum voltage.
If the tension in a guitar string is increased by 20%, by what percentage does the wave speed increase? Harmonic waves are produced by a source that isoscillating in SHM. Which one of the following statements is correct concerning harmonic waves?
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To recharge a 3.7V Lithium-ion battery, a battery charger must move 1320 mAxh of charge from the negative terminal to the positive terminal
A 54-kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1.7 m/s, determine her altitude as she crosses the bar
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The brakes are applied and the bicycle is brought to a uniform speed. During braking , the bicycle covers a translational distance of 10m, Evaluate how many turns that each wheel would make during braking.
A proton is moving paralell to a uniform electric field. The electric field accelerates the proton and increases its linearmomentum to 5.0 x 10-23 kg x m/s in time of 6.3 x10-6s. What is the magnitude of the electric field?
a 2kg block of wood slides on the surface shown. all surfaces are frictionless, except the trough which is rough; the coefficient of kinetic friction there is 0.2 and the trough is 15m long. where will the block come to rest
A total of 34 bright and 34 dark Newton's rings (not counting the dark spot at the center) are observed as 550 -nm light falls normally on a planoconvex lens resting on a flat glass surface. How much broad is the center than the edges.
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