A potential difference of 3.00 nV is set up across a 2.00 cm length of copper wire that has a radius of 2.00 mm. How much charge drifts through a cross section in 3.00 ms? The resistivity of copper is 8 rho 1.69 10 m − = ⋅ Ω⋅ .

3.35×10^-7C

Explanation:

First we must put down the formula for charge drifting at a time t. But current is related to voltage by ohm's law as shown in the image attached. From the relation of ohm's law and the formula for resistivity, the expression that can be used to obtain the charge flowing at a time t, can be derived. Substitution of values gives the answer.

from

explanation:

wind is defined by the direction it blows from.   for example, a wind blowing from north to south is called a northerly wind.

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.