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A surveyor is using a magnetic compass 6.5 m below a power line in which there is a steady current of 100 A. What is the magnetic field in microteslas at the site of the compass due to the power line?
A plucked guitar string produces a sound wave of frequency 440 Hz. What is the wavelength of the sound wave
You and a friend are measuring a field for an ecology experiment. You walk due east at a speed of 0.9 m/s, how far from your friend are you
An inductor has an inductance of 0.069 H. The voltage across this inductor is 56 V, What is the current in the inductor
A popcorn kernal initially at rest, explodes into two peices, one haveing twice the mass of the other. What is the ration of velocities of the frgament
An object moves with constant acceleration 5.00 m/s2 and over a time interval reaches a final velocity of 11.2 m/s. (a) If its initial velocity is 5.6 m/s, what is its displacement during the time interval?
two stationary positive point charges charge 1 of magnitude 3.45 nc and charge 2 of magnitude 2.00 nc are separated by
A magician pulls a tablecloth from under a 200 g mug located 30.0 cm from the edge of the cloth. The cloth exerts a friction force of 0.100 N on the mug, and the cloth is pulled with a constant acceleration of 3.50 m/s2.
A long straight wire lying along the x-axis carries a constant 5 A current along the positive x direction. A small 5mm diameter loop lies in the x-y plane centered at y = 2m. If the loop is suddenly stretched so that its area shrinks to zero in 0...
A flywheel has a constant angular deceleration of -2.01 rad/s2. Find the angle through which the flywheel turns as it comes to rest from an angular speed of 186 rad/s
The projection lens in a certain slide projector is a single thin lens. A slide 24.6 mm high is to be projected so that its image fills a screen 1.78 m high. Determine the focal length of the projection lens
A quarterback throws a pass that is a perfect spiral. In otherwords, the football does not wobble, but spins smoothly about anaxis passing through each end of the ball. how many revolutions has the ball made while in the air
A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action, How long will the mortar shell remain in the air
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