An alternating current circuit has resistance r, inductance l and capacitance c in series with a voltage source. which statement is correct?
question options:
1) the voltage across the capacitor leads the voltage across the inductor by 90°.
2) the voltage across the inductor leads the voltage across the capacitor by 90°.
3) the voltage across the inductor leads the voltage across the resistor by 180°.
4) the voltage across the inductor leads the voltage across the capacitor by 180°.
5) both voltages lead the voltage across the resistor by 90°.

The charge on an electron is 1.60218 × 10−19 c and its mass is 9.10939 × 10−31 kg. how strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.5 cm? answer in units of t.

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

Which of the following are molecules? a. al b. ag c. mgcl2 d. nacl e. c3h8