Two resistors have resistances R1 and R2, where R1 = 2.8R2. When configured in series and connected to a source potential of 23.6 V, they draw 0.723 W of power. If their configuration is changed to be in parallel and the source potential remains the same, what power does the circuit draw

A voltage V(t) = Vm sin(wt) is applied across a 49 ohm resistor. What is the average power in Watts dissipated in the resistor? Vm = 12 volts

A 13.0 kΩ resistor and a capacitor are connected in series and then a 20.0 V potential difference is suddenly applied across them. The potential difference across the capacitor rises to 5.0 V in  4.8 μs. Find the capacitance of the capacitor. (Your result must be in multiples of 10-10 Farads and include 2 digit after the decimal point.  That means if, for example, you get a result of a 9.22x10-10 just type 9.22 in the answer box.  Maximum of 5% of error is accepted in your answer. )

Two 6.0 µF capacitors, two 2.2 kΩ resistors, and a 12.5 V source are connected in series. Starting from the uncharged state, how long does it take for the current to drop from its initial value to 1.30 mA?