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A parallel plate air capacitor has a capacitance of C (25 μF). The charge on each plate is Q (50 μC). There are no batteries connected to the capacitor. How much work is required to double the separation distance between the plates?
q1. a box is sliding up an incline that makes an angle of 27.7 deg regarding the horizontal. the coefficient of kinetic
A 4.0 kg block rests at the edge of a disk with a mass of 5.0 kg and a radius of 30 cm. A 2 N force is applied to the edge of the disk. What is the angular acceleration of the disk and block
imagine removing one electron from every atom in a tiny cube of gold 1 mm on a side. never mind how you would hold the
A step-up transformer increases 15.7V to 110V. What is the current in the secondary as compared to the primary? Assume 100 percent efficiency.
An RC series circuit has R = 71.0 \Omega and C = 550 nF. The series combination is connected across a 250 V (rms), 64 Hz power supply. Find the impedance of the RC combination
The diodes are oppositely oriented, so that when one diode is forward-biased, the other is back-biased. Which phrase best describes the current in the circuit.
Two rods, one made of brass and the other made of copper, are joined end to end. The length of the brass section is 0.290m and the length of the copper section is 0.710m . Each segment has cross-sectional area 6.30×10?3m^2 .
A 16.0 m uniform ladder weighing480 N rests against a friction less wall. The ladder makes a 61.0° angle with the horizontal. Discover the horizontal and vertical forces the ground exerts on the base of the ladder when an 840 N fire fighter is 4.20 m..
a 0.25kg block is placed on a light vertical spring k5 x 103nm and pushed downwards compressing the spring and
A baseball is thrown horizontally at the catcher, who is 60.0 ft away. It is thrown with a velocity of 87.5 mph. How far does the baseball fall during this pitch.
a 40 g block of of ice is cooled to -72 C and then is added to 650 g of water in an 80 g copper calorimeter at a temperature of 24C, determine the final temperature of the system consisting of the ice
A 1200 N uniform boom is supported by a cable perpendicular to the boom, as in Figure P8.28. The boom is hinged at the bottom, and a 2000 N weight hangs from its top. Find out the tension in the supporting cable and the components of the reaction ..
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