Question

I need help, please

Answer 1

@theEric

Answer 2

Hello! What are your guesses, initially?

Answer 3

the first one is for sure, right?

Answer 4

For sure! :)
And do you have any other guesses?

Answer 5

the third one, too, right?

Answer 6

no,no

Answer 7

Nope! :) But close!

Answer 8

the marble acquires a positive charge and attracts the piece of silk, since they are opposite charge

Answer 9

Right! :) And that means that none of the other options are valid. So it's just the first and fourth option.

Answer 10

laalala, thank you so much.

Answer 11

You're welcome :)

Answer 12

Two glass marbles (1 and 2), each supported by a nylon thread, are rubbed against a piece of silk and then are placed near a third glass marble (3), also supported by a similar thread. Assuming that marble 3 has not been in contact with the piece of fabric, which of the following statements best describes the situation when the three marbles are brought together?
I don't understand what the role of "each supported by a nylon thread" is. Please explain me

Answer 13

1/Marbles 1 and 2 attract each other, but no interaction occurs with marble 3.
2/Both marbles 1 and 2 attract marble 3.
3/The three marbles will repel each other.
4/ Marbles 1 and 2 repel each other, but no interaction occurs with marble 3.

Answer 14

The nylon thread just doesn't allow the electrons to travel through to that connection. So, the glass marble will get a positive charge. The nylon rope won't allow the electrons to come from whatever the marble is hanging from to negate all the charge.


Have you heard of polarization in the context of electric charge?

Answer 15

yes, I have but not quite clear.
so, the choice is 2 , right?

Answer 16

I change, it's 4

Answer 17

hihihi.... actually, I am not sure the second part of the option 4. However, I am sure the first part. since 1and 2 have the same positive charge, they repel to each other.

Answer 18

Right! The 1 and 2 will repel each other.

If you don't care about polarization, then 3 won't interact because it has a neutral charge.

Answer 19

Thanks again. :)

Answer 20

You're welcome! :)