Select the correct answer. What generates the magnetic field in a current carrying wire?
ОА.
stationary protons
OB.
stationary electrons
OC.
movement of charged particles
D.
magnetic force

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

Is a copper wire a conductor or insulator?