P114-Morning –Summer’06
Due
Team #____________
Member #1_____________________
Member #2_____________________
Member #3_____________________
1.- Conductivity of solutions: in the experiment shown below, which solution would give the brightest light? Order them from brightest to dimmest: tap water, distill water, water with dissolved sugar, water with dissolved salt, water with vinegar. Include a detailed explanation using the terminologies we have introduced related to electricity.
2.- Electron momentum: Electrons have mass, describe an experiment that would visually confirm that electrons in motion can transfer momentum to physical objects such as a wheel with paddles.
3.-
Magnetic force: describe what
happens if a magnet is placed close to a transparent light bulb (such that you
can se the thin resistance inside) a)if the bulb is powered a DC battery (flash
light) b)if it is powered by an AC (alternating current) outlet. AC changes
direction 60 times per second or its frequency is 60Hz.