What potential difference vwc between the wire and the cylinder produces an electric field of 2.00ã104 volts per meter at a distance of 1.20 centimeters from the axis of the wire? (assume that the wire and cylinder are both very long in comparison to their

In case of a long wire, electric field E is inversely proportional to r

Therefore E= x/r or x = E*r

Now, 

b) 10 minutes

girls stopped for 10 minutes.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )