Electric current can best be induced in a wire by
a. stretching the wire.
b. moving a magnet up and down near the wire.
c. setting the wire near a magnet.
d. rotating the wire. e. none of the above

Which surface feature of the moon is characterized by mountainous areas? terrae craters maria regolith

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.