Which of the following relationships must be true according to the laws of series and parallel connections? (Select only relationships that must be true according to the laws of series and parallel connections, not those that are true in this problem only because of the particular resistances given.)

a. I_1 = I_3
b. I_3 = I_4
c. I_2 = I_1 + I_3
d. I_1 = I_3 + I_2
e. V_1= V_2
f. V_3 = V_4
g. V_1 = V_3 + V_4
h. V_2 = V_3 + V _4
i. V_1 = V_2 + V_3 + V_4

What is the major limitation to the light microscope?

Whithin which type of system is neither the total mass nor the total energy conserved ? a. open b. connected c. isolated d. closed

Irrigation channels that require regular flow monitoring are often equipped with electromagnetic flowmeters in which the magnetic field is produced by horizontal coils embedded in the bottom of the channel. a particular coil has 100 turns and a diameter of 6.0 m. when it's time for a measurement, a 4.5 a current is turned on. the large diameter of the coil means that the field in the water flowing directly above the center of the coil is approximately equal to the field in the center of the coil. the field is directed downward and the water is flowing east. the water is flowing above the center of the coil at 1.5 m/s . what is the magnitude of the field at the center of the coil? what is the direction of the force on a positive ion in the water above the center of the coil? what is the magnitude of the force on an ion with a charge +e?