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A homemade capacitor is assembled by placing two 7 in pie pans 10 cm apart and connecting them to the opposite terminals of a 9 V battery.
(a) Estimate the capacitance.
(b) Estimate the charge on each plate.
(c) Estimate the electric field halfway between the plates.
(d) Estimate the work done by the battery to charge the plates.
A spherical Christmas tree ornament is7.18 cm in diameter.What is magnification of the image ofan object placed 8.6 cm away from the ornament.
A steel wire of mass 0.400kg and length 0.640m supports a 102 kg block. The wire is struck exactly at its midpoint causing a small displacement. How long does it take the peak of this displacement to reach the top of the wire.
A car is traveling around a horizontal circular track with radius r = 240 m at a constant speed v = 17 m/s, What is the y component of the car's acceleration when it is at point B
A plastic bag is filled with hydrogen at atmospheric pressure and 27.0 oC. Assume that the mass of the bag is negligible, How large a volume of hydrogen (in m3) is required
A small conductive rod of length 1.4 m moves with a constant velocity v=11 m/s in a direction parallel to a long wire carrying a current of 34 A. Calculate the electric potential induced across the rod
An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 440-g sample of silver at an initial temperature of 85°C is placed in the water. Calculate the mass of the aluminum cup
A 1410-kg racecar is driving around a circular track of radius 161 m. What is the magnitude of the net force acting on the vehicle at this time and the force's direction relative to the velocity
The Cosmoclock 21 Ferris wheel in Yokohama City, Japan, has a diameter of 100 m, Find the speed of the passengers when the Ferris wheel is rotating at this rate
A pump is required to lift a mass of 780kg of water per minute from a well of depth 13.7m and eject it with a speed of 17.9m/s, What must be the power output of the pump
A hot dog cooker heats hot dogs by connecting them to 120 V household electricity. A typical hot dog has a mass of 50g and a resistance of 130ohm . How long will it take for the cooker to raise the temperature of the hot dog from 20c to 80c ? The ..
A rotating wheel requires 2.99-s to rotate through 37.0 revolutions. What is the constant angular acceleration of the wheel
Boy is stands on a scale in an elevator that is accelerating upward. Scale reads 723.8 N. Find magnitude of the acceleration of the elevator
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