You may have noticed that when you recorded the area under the force vs. distance curve you used units of N·m. When you calculated the change in potential energy (∆U) the units where joules (J). Both are a measure of the work. Is there a problem? Explain. Hint: ""Unit Analysis""

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Select the correct answer from each drop-down menu. compared to its surroundings, the concentration of solutes is low inside a cell. so, the cell is with respect to its surroundings. a particular solute in this cell uses energy for its transport from the cell to its surroundings. this type of transport is called

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds