Two coils have mutual inductance m = 3.25×10−4h. the current i1 in the first coil increases at a uniform rate of 830 a/s. a) what is the magnitude of the induced emf in the second coil? is it constant? b) suppose that the current described is in the second coil rather than the first. what is the magnitude of the induced emf in the first coil?

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

What causes the formation of ocean currents?

What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has mass of 0.15 kg?