Most telephone cables are made up of copper wire of either 24 or 26 gauge. if the resistance of the 24-gauge wire is 137 ohm/mile and the resistance of the 26-gauge wire is 220 ohm/mile, what is the ratio of the diameter of the 24-gauge wire to that of the 26-gauge wire?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

Ethanol has a heat of vaporization of 38.56 kj/mol and a normal boiling point of 78.4 c. what is the vapor pressure of ethanol at 14 c?