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Three 18-cm-long rods form an equilateral triangle. Two of the rods are charged to + 10 nC, the third to -10 nC.
What is the electric field strength at the center of the triangle?
Starting from the top left corner and moving clockwise the charges are -10 uC, -10 uC, 5 uC, and 5 uC. What is the electric field at the center of the square array of charges
A 768 kg car moving at 27 m/s brakes to a stop. The brakes contain about 16 kg of iron that absorb the energy. What is increase in temperature of the brakes
A child is pushing a merry-go-round. The angle through which the merry-go-round has turned varies with time according to ?(t)=?t+?t3, What is the initial value of the angular velocity
What is the magnitude of the normal force exerted by the car.
If air resistance & other effects are ignored how far away did the shell hit.
On a warm day (86?F), an air-filled balloon occupies a volume of 0.250m3 and has a pressure of 18.0lb/in2, what is the volume of the air in the container
Calculate the force of gravity on the same 1-kg mass if it were is 6.4 x106 m above the earth’s surface (that is, if it were 2 Earth radii from the Earth’s center)
Wildlife biologists fire 20-g rubber bullets to stop a rhinoceros charging at 0.81m/s. What impulse does each bullet deliver
A proposed ocean thermal-energy conversion (OTEC) system is a heat engine that would operate between warm water (26°C) at the ocean's surface, What is the maximum possible efficiency of the system
Inductors in parallel. Two inductors L1 = 1.34 H and L2 = 2.20 H are connected in parallel and separated by a large distance so that the magnetic field of one cannot affect the other. Calculate the equivalent inductance
A 0.400-kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 23.0 N/m. How far does the putty-block system compress the spring
If the string is 9.5 long, has a mass of 30 and is pulled taut with a tension of 8.50, how much time does it take for a wave to travel from one end of string to the other?
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