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Two resistors A and B are connected in series to a 9.0 V battery; the voltage across resistor A is 6.0 V. When A and B are connected in parallel across a 9.0 V battery, the current through B is 3.0 A. What are the resistances of A and B? The batteries have negligible internal resistance.
Consider an optical gain medium that has two levels at E 1=1.50 eV and E 2=3.50 eV. What is the resonant absorption wavelength
Explain the difference between a fluorescence emission spectrum and a fluorescence excitation spectrum, What is the force constant for the CO bond
The second person, on the opposite side of the lock, pulls at an angle of 45o. Illustrate with what force should the second person pull so that the net force on the raft is in the forward direction?
When a battery is connected to the plates of a 2.00-µF capacitor, it stores a charge of 30.0 µC. What is the voltage of the battery
You have three resistors with values 3.7?, 2.8?, 5.1?, and a battery of 3.6V. You begin by connecting the three resistors in parallel, What is the magnitude of the current in the 2.8 resistor
A guitar string is 91.00cm long and has a mass of 3.6g. From the bridge to the support post (= L) is 60 cm, and the string is under a tension of 551 N.
A 29 g rifle bullet travelling 270 m/s buries itself in a 3.50 kg pendulum hanging on a 2.6 m long string, which makes pendulum swing upward in an arc. Find out the horizontal component of the pendulum's displacement.
Two rigid rods are oriented parallel to each other and to the ground. The rods carry the same current in the same direction. Determine the current in the rods
A car travels at a speed of 29 m/s around a curve of radius 67 m. What is the net centripetal force required to keep the car from skidding sideway.
Determine the simple harmonic motion of the spring what ac velocity is ball moving
Four wires meet at a junction. In two of the wires currents I1 = 1.51 A and I2 = 2.99 A enter the junction. Find the current in the fourth wire
A particle with a mass of 0.420 kg is attached to a horizontal spring with a force constant of 34.02 N/m. At the moment t = 0, Find the length of a simple pendulum with the same period
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