Aballoon, initially neutral, is rubbed with fur until it acquires a net charge of -0.60 nc. (a) assuming that only electrons are transferred, were electrons removed from the balloon or added to it? (b) how many electrons were transferred?

(a) electrons are added

(b)

Explanation:

Charge acquired by the balloon, q = - 0.6 nC

(a) As the balloon gets negative charge, so that it means the balloon gains electrons. The electrons are negatively charged, so a body have negatively charged means that the electrons are added to the body.

(b) The charge of one electron is given by e.

e =

The number of electrons is given by the ratio of total charge to the charge of one electron.

let there are n number of electrons

n =

i need the answer to this too but idk it ; -;

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27