A man runs 300 m West in 60 seconds. He then runs 100 m North-west in 20 seconds.
What is his average velocity in metres per second?

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

How can you increase the strength of an electromagnet?

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c.m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?