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Two long, straight, parallel wires of length 4.1 m carry parallel currents of 3.2 A and 1.1 A.
(a) If the wires are separated by a distance of 3.1 cm, what is the magnitude of the force between the two wires?
(b) If the currents are in opposite directions (antiparallel), how does the answer to part (a) change? What is the magnitude of the force between the two wires?
A listener increases his distance from a sound source by a factor of 3.62. what is the change in the sound intensity level in dB
In the Bohr model of hydrogen, the electron moves in a circular orbit around the nucleus. Determine the angular speed of the electron
Explain how much waork has been done against gravity when the crate is raised a vertical distance of 2.19 m? The coefficient of friction is 0.316.
A floodlight with a mass of 20.0 kg is used to clarify the parking lot. The floodlight is supported at the end of a horizontal beam that is hinged to a vertical pole.
Find out the friction force on the box
The density of petrol is 730 kg/m^3 at 0 degrees C. Its average coefficient of expansion is 9.60 * 10^-4 degrees C. Assuming you have a 45 litre full tank, how many extra grams of petrol would you get
A 35 N hand and forearm are held at a 45 degree angle to the vertically oriented humerus. how much force must be exerted by the forearm flexors to maintain this position
A simple generator has a 620-loop square coil 21cm on a side. How fast must it turn in the 0.690 T field to produce a 140 V peak output.
Having taken a nap under a tree only 20 m from the finish line, Rabbit wakes up to find Turtle 19.5 m beyond him, grinding along at 1/4 m/s. If the bewildered hare can accelerate at 9 m/s2 up to his top speed of 16 m/s (36 mi/h) and sustain that s..
During a physics experiment, helium gas is cooled to a temperature of 10.0K at a pressure of 9.00×10?2atm. What is the avergage energy per atom
One of the Niagara turbines uses 172,000 cubic feet of water perminute under a head of 215 ft. What is the horsepower developed
A certain red giant star has a luminosity of 100,000 times that of the Sun and is located 600 light-years from Earth. calculate the rate of interstellar extinction in the direction of the star
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