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A wire carries an unknown current along the x axis. At a distance of 7cm from the wire the magnetic field has a strength of 10.0mT. What is the current in the wire?
A crude model of the human vocal tract treats it as a pipe closed at one end.Find the effective length of the vocal tract in a person whose fundamental tone is 550Hz . Sound speed in air at body temperature is 354 m/s.
A police car is traveling east at 40.0 m/s along a straight road,overtaking a car ahead of it moving east at 30.0 m/s. What is thewavelength behind the police car in meters
A 75 kilogram skier grips a moving rope that is powered by an engine and is pulled at constant speed to the top of a 23 degree hill. obtain what is the horsepower of the engine required
A gun shoots bullets that leave the muzzle with a speed of 205m/s. If a bullet is to hit a target 151m away at the level of the muzzle, the gun must be aimed at a point above target.
a baseball leaves the bat with a speed about 45 ms which is greater than its terminal speed in air when droppeed from
To listen to a radio station, a certain home receiver must pick up a signal of at least 1.0X10^-10 W.If the radio waves have a frequency of 93MHz, how many photons must the receiver absorb per second to get the station?
Calculate the kinetic energies of two uniform solid cylinders, each rotating about its central axis. They have the same mass, 2.75 kg
In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.8 m/s, grabs him. find the mass of the receiver
q1. a car slows down with an acceleration that has a magnitude of 3.6 ms2. while doing so it travels 113 m in the x
Let's model a nucleus as a particle trapped in the one dimensional box. Determine the energies of the proton in the ground state and first two excited states
Lonnie pitches a baseball of mass .20 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to Lonnie with a return speed of 60-m/s. If the bat is in contact with the ball for .050 s, what is the impulse experienced..
The planet Neptune orbits our Sun at an average distance of 4.50 * 10^9 km.It's mass is 1.02 8 10^26 kg. The Sun's mass is 1.99 * 10^30 kg. What is the strength of the gravitational field at the "surface"of Neptune
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