Recent content by johndoe14

Homework Statement A current of 1.82A flows through a copper wire 1.75m long and 1.10mm in diameter. a)find the potential difference between the ends of the wire b) what diameter of copper wire is needed to be a potential difference of .100V Homework Equations I know the resistivity of...

do we assume that when the bullet collides with the block the block has the same velocity as the bullet?

am i correct by saying that the block has a kinetic energy of____ due to the bullet ke= .5*.012kg*1600m/s^2 = 15360kgm/s^2

Homework Statement A 12g bullet is fired at 1600m/s into a wooden block of a ballistic pendulum, causing it to swing back, raising up 1.40m vertically. Find mass of the block Homework Equations N/a The Attempt at a Solution bullet momentum= 12g*1600m/s=19.2kgm/s