With Battery Voltage at 6 volts Run 4 20. Click on the last series parallel circuit (last one on right) 21. Change resistor 1, resistor 2, resistor 3 and resistor 4 to the values in run 4 and record voltage, total current and total power for Run 2 in rows 60-83 16. Calculate the resistance using Voltage and current, again using voltage and power, again using current and power, and again using R1, R2,R3, and R4 recording the calculations for Run 4 rows 2 60-83

Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ∆t. the resistance of the coil is r, and the total charge is q = i∆t, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly “swiped” past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be “swiped” through the reader at exactly the right speed? why or why not?

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.

You can estimate the degree to which a bond between two atoms is ionic or covalent by calculating the