a)Bits of paper are attracted to an electrified comb even though they have no net chargeHow is this possible?bA positively charged glass rod is brought close to a neutral sphere that is supported on a nonconducting plastic standSketch the distribution of charges on the sphere if it is made of:a)Aluminumb)Non-conducting plastic(maybe explain what the sketch would look like, since you cant draw on here)cif you touch the ball of a charged electroscope with your finger, will it discharge? what does this suggest about the conducting properties of people? explain.
Your microwave will arcIt will probably ruin itDon't ever put foil in the microwave.
yeah.in that instance you prolly shouldn't use the foil.but some newer microwaves actually allow a little bit of foil on top of the food that's being cooked as long as it doesnt touch the inner walls of the oven.
you aren't supposed to put foil in the microwave at all, it will mess your microwave up, i don't know what the most damage is because whenever i mistakenly put foil in the microwave and hear the noise i hurry and take it out, but if the potato chip bags are made of foil it won't do too much damage because me and my cousins and my brother are always puttin' them in the microwave and the only thing they do is shrink.
No foil will spark and eventually catch fire as well as short out your microwaveYou won't get your sandwich and you'll have to buy a new microwave! Just take it out and sit it on a plate or put into another plastic bag
Well, first off, both an insulator(i.e paper) and a conductor (i.e metal) can be chargedThe only difference is in the mobility of the chargeSo, what happens for a) is that the paper is initially neutral but the comb has been negatively chargedAs you bring the comb close to the paper, the paper undergoes charge polarizationThis means that there is a separation of the positive and negative charges in a neutral object, so the positive will be attracted to the comb, while the negative charges of the paper will be at the bottom repelling each other at the same timeNevertheless, the attractive forces on the top from the paper are greater than the repulsive forces on the bottom because the net force toward the charged comb causes a polarization forceIt arises due to the separation of charge in the paperb) As the (+) rod approaches an aluminum sphere, the same positive charges will be spread through the sphere so that its net charge is mainly positiveIf it were connected to a conducting rod and two leafs at the ends, you would see that the positive charges would travel to the leaves and this would cause repulsive forces: spreading of leaves in opposing directionc) In a non-conducting plastic (assuming initially neutrally charged) , I guess what would happen is that there will be a charge polarization as in a)d) Yes it will discharge, because people are also conductors (atoms and molecules that make up our body are charged)Also, we provide a means for the electrons to dissipate.
