Four compasses are placed around a wire, as shown. the wire is then connected to a battery so that a current flows down the wire. how will the compasses point once the current is flowing?

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.