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A long straight wire suspended in the air carries a current of 8.2 A in the -x direction. The wire runs along the x-axis such that it goes through the origin. At a particular instant an electron at location <0,-3,0> cm has a velocity of <-1.5E5, 1.8E5, 0> m/s. What is the magnitude of the magnetic force on the electron?
One swimmer in a relay race has a 0.49 s lead and is swimming at a constant speed of 3.97 m/s. the swimmer has 57.7 m to swim before reaching the end of the pool
A spring is oscillating with a frequency of 1.7Hz. 3.9 seconds after the spring is released it is -20cm from equilibrium. Find the amplitude of the spring
A typical human eye is nearly spherical and usually about 2.5 cm in diameter. Find the approximate size of each image (coin and friend) on her retina
consider a merry-go-round in the shape of a uniform disc of mass 400 kg and radius 3 m. two children each of mass 20 kg
Starting from rest, you move with a constant acceleration of 2.1 m/s2 for 13.0 s and then move with an acceleration of -2.1 m/s2 for another 13.0 s. How far do you go during the whole trip
In order to determine the mass of a molecule, first an electron is removed from the molecule. The resulting ion is accelerated from rest by an electric potential difference 2.7 104 V, Find the mass of the ion
A 83.0-?F capacitor is connected to a generator operating at a low frequency. The rms voltage of the generator is 2.60 V and is constant. at what frequency will the fuse burn out
A car traveling at 25 m/s ( about 55 mph) crashes into a road barrier and comes to a stop in 0.2 sec. What is the average force in Newtons felt by a 75 Kg person in a set belt
A 34.0kg crate is initially moving with a velocity that has magnitude 3.70m/s in a direction 37.0 %u2218west of north. How much work must be done on the crate
The model airplane in Figure 5.7 is flying at a speed of 14.4 m/s on a horizontal circle of radius 17.2 m. The mass of the plane is 1.19 kg. What is the net work done on the plane
A cyclist hits the brakes and decelerates. His wheels were spinning at 175 rev/min initially and 40 rev/min after 5 s of deceleration. Compute the average angular acceleration (in rad/s2) of his wheel during this 5 s period
The velocity of the air with respect to the ground is 50.0 m/s at an angle of 30.0 degrees NORTH of EAST. What is the velocity of the airplane
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