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(a) A 3.0 K ohms resistor is connected in series with a capacitor at time T=0. Its fully charged and at a voltage of 24V. What is the time constant of this circuit?
(b) what would be the current through the resistor after 1.0 micro seconds.
(c) This resistor powers a tiny device that needs a minimum of .05 W to run the device. How long will the capacitor be able to run the device? (hint: what would be the minimum voltage needed to be across the resistor)
A common flashlight bulb is rated at 0.30 A and 2.8 V (the values of the current and voltage under operating conditions). what is the temperature of the filament when the bulb is on? The filament is made of tungsten
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Tasha with a nearsighted eye has near and far points of 16 cm and 25 cm, respectively. What is the power of the lens she uses
Two spherical objects have a combined mass of 190 kg. The gravitational attraction between them is 8.26×10?6 N when their centers are 17.0 cm apart. What is the mass of the heavier object
A mass spectrometer applies a voltage of 2 kV to accelerate a singly charged positive ion. A magnetic field of B = 0.400 T then bends the ion into a circular path of radius 0.305m. What is the mass of the ion.
after completing the calculations below sketch the ph curve for the titration of 25.0 ml of 0.200m solution of a weak
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The figure shows three blocks attached by cords that loop over frictionless pulleys. Block B lies on a frictionless table; what is the tension in the cord at the right
An air-filled toroidal solenoid has a mean radius of 16.0cm and a cross-sectional area of 5.00cm2. How many turns does the winding have
a a balloon of radius 30.5 cm is sprayed with a metallic coating so that the surface is conducting. a charge of
A hot-air balloon is ascending at the rate of 11 m/s and is 68 m above the ground as a package is dropped over the side. How long does it take to reach the ground.
A step-down transformer is used for recharging the batteries of portable devices. estimate the rms output voltage of the transformer
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