Joan makes the device shown in her science class. what would happen to the magnetic field if she connects the battery in the opposite direction?

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference

What is the angular momentum of the bar about the axle?