The electromagnet in a galavanometer.
a. increases the voltage in a circuit.
b. moves a pointer along a numbered scale in response to a current.
c. induces an electric current.
d. increases the current in a circuit.

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.

What are some properties of transverse waves?