A circular conducting loop of area 2x10-?m’ and resistance 102 ohm is placed with its plane perpendicular to a varying magnetic field B = (10t + 4)mt. The rate at which thermal energy is
generated in the loop is
1) 4mw
2) 0.4 uw
3) 4uw
4) 2uw​

Why should seat belts not be mandatory quick plz

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.

Adolphin emits ultrasound at 100khz and uses the timing of reflections to determine the position of objects in the water. part a what is the wavelength of this ultrasound? assume that temperature of water is 20 degrees c. answer in cm