Thursday, March 19, 2009

Motor!

Cheeeeee finally :)

Sunday, March 8, 2009

A Glue Gun and Physics



While I was redecorating my room this past weekend, I needed to use a hot glue gun to attach an old pair of sunglasses to my wall.  When I was gluing the glasses on, I recognized that the side of the glue gun showed me how much voltage flowed through the appliance, and the number of watts that was in it.  I then realized that this was physics! In order for the gun to heat up and melt the plastic glue, an electric current needed to be flowing through the wires from the wall.  Like a standard wall outlet, the glue gun had 120 V running through it.  The output of the circuit was 10W.  According to the equation P=IV, the current flowing through the appliance was 1/12 A.