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Consider an alternating current of the form i(t) sin(2pit), where t is the time elapsed measured in seconds. (a) at what times is the magnitude of the current largest? (b) if this current were applied to a resistor, at what times would the magnitude of the voltage across the resistor be largest? repeat for an inductor and for a capacitor
Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.170 g and a charge of magnitude q. Find the magnitude of the charge on the balls
Two automobiles, each of mass 900 kg, are moving at the same speed, 15 m/s, when they have an inelastic collision.(a) In what direction and at what velocity does the wreckage move if one car was driving north and one south? (b) In what direction a..
0.45 kg of a metal at 90.°C is added to 0.40 kg of water at 20.0°C. If the final temperature of the mixture is 26.°C, what is the specific heat of the metal
Suppose that a particle accelerator is used to move two beams of particles in opposite directions, what is the magnitude of the average current in this region
The closest star to our solar system is Alpha Centauri, which is 4.30 light years away. How much time would elapse on a clock on the Earth
a rigid structure consisting of a circular hoop of radius R and mass m, and a square made of four thin bars, calculate the angular momentum about that axis
If the pressure of the 1.2-cm3 volume is reduced to 1.2 × 10?11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
A copper-constantan thermocouple generates a voltage of 4.75 x 10-3 volts when the temperature of the hot junction is 110 °C, what is the temperature in degrees Celsius of the hot junction
The membrane that surrounds a certain type of living cell has a surface area of 5.00 10-9 m2 and a thickness of 1 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.
A certain telescope has an objective of focal length 1580cm. If the Moon is used as an object, a 1.4 cm long image formed by objective corresponds to what distance, in miles, on the Moon? Suppose 3.8 multiplied by 108 m for the Earth-Moon distance..
A charge of - 0.580uC exerts an upward force of magnitude 0.170N on an unknown charge which is a distance of 0.300m directly below it. What is the unknown charge
A spherical conductor is charged so that its surface potential is Vo=1000V. If the radius of the sphere is R=10m, what is the potential in the center of the sphere
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