Recent content by grade11

Whoa calm it down, seroiusly wat is your problem? I am asking the question because i do not understand the answers? and i thought the thing from yesterday was telling me that my questions didnt make sense and i had to reword them, like you can either help or not but don't run me down on what...

I just have some questions about this stuff... How can the nature of a material determine if it can be made into a magnet? Whats the field around a straight conducter look like? Whats the direction of the magnetic field of a soleniod? Whats the action of a relay? How are the...

Ok can anyone tell me how the nature of a material determine if it can be made into a magnet? Can anyone illistrate any ne of these to me - the field around a straight conductor - the magnetic field direction of a soleniod -the action of a relay how was the telephone developed...

ohh i have another question... how is direct current different from alternating curent? Why do you thinkk the alternating current system was chosen in Canada?

ohh i have another question... how is direct current different from alternating curent? Why do you thinkk the alternating current system was chosen in Canada?

Wow thanks for answering all that lol it had the perfect answeres to my questions and i understood it too good job THANKS!

Can anyone describe to me what happens to electrons when one material is charged negatively by rybbing it on a second material, what must be different about the materials for this to work? And why does vinigear act as such a better electrolyte then water in a wet cell type? Why is a...

ohhh right i was doing 80 centimatres was 0.08 metres hahahaha whooops simple math too ok how about b and c?? anyone can help me out?

srry i got to keep posting these to see if u responded or not...

that sound right?

ohh ok so the mass for the initial is just 0.015 kg ok soo there is not hieght so that's adding no potential energy so i got 0.015(840)^2/2 ok so that's 5300J while my Em will be 18.80J so that's thermal energy of like 5288 j?

also wat about b and c?

ok i get around 8500J for my begginign energy and about 20J for my ending energy does that make sense that 8480J would be thermal energy?

ohhh right my speeed would be zero because at the max hieght there is no speed

also wat is my speed in the Em as the bag rises? would i use 840 again as i did when the bag was stationary?