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Two long, straight, parallel wires carry the similar current in te same direction. (A) Use both the right-hand source and force rules to decide whether the forces on the wires are (1) attractive or (2) repulsive. (B) If the wires are 24 cm apart and experience a force per unit length of 24mN/m, decide the current in each wire. (C) What is the magnetic field strength midway among the two wires?
a person (weight W = 598 N, L1 = 0.849 m, L2 = 0.398 m) doing push-ups. Find the normal force exerted by the floor on each hand and each foot
Consider laser eye surgery, in which laser light with a wavelength of 426 nm at a power output of 1.6 W is used to reattach a detached retina. how many photons are emitted by the laser
You are given 65.000 cm of copper wire with diameter 7.0000 mm. compute At what rate is thermal energy generated in the loop
An alert physics student stands beside the tracks as a train rolls slowly past. calculate the speed of the train
A certain cablecar in San fransisco can stop in 10 sec upon the application of the brakes while traveling at full speed Upon seeing a dog ahead of the car the driver instantly applies the full brakes, How far was the cable car from the dog when the..
A bungee cord is stretched between two poles with a force of 390 N. What is the velocity of a wave on this bungee cord
A uniform solid disk of turns around a frictionless spindle with an angular speed wo. Find what fraction of the kinetic energy is lost
Light from a helium-neon laser is shines on a slit of width 0.02mm. Explain qualitatively the pattern of light seen on a screen 1.0 meter away. How would the pattern be dissimilar if the slit were 0.06mm wide instead of 0.02 mm?
a meteorologist for a tv station is using radar to determine the distance to a cloud. he notes that a time of 0.28ms
A neutron star has a mass of 2.0*10^30 kg (about the mass of our sun) and a radius of 5.2*10^3 m (about the height of a good-sized mountain). assume an object falls from rest near the surface of such a sta
An intergalactic rock star bangs his drum every 1.50 s. A person on earth measures that the time between beats is 2.30 s. How fast is the rock star moving relative to the earth
There is a charge of -3e locked down at a point on a table. 15 meters away, a charge of 3e is released from a scientists hand. What is the potential energy of the charge just as it is released from the scientists hand
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