An ideal solenoid that is 34.0 cm long is carrying a current of 2.00 A. If the magnitude of the magnetic field generated at the center of the solenoid is 9.00 mT, how many turns of wire does this solenoid contain? (?0 = 4? × 10-7 T ? m/A)
A) 860 B) 2320 C) 1590 D) 3180 E) 1220
E
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If an AC circuit consists of a 220 mH inductor in series with a 25 pF capacitor and an AC generator with rms voltage of 12 V. If the frequency of the generator is 55 kHz, what will the rms voltage drop across the inductor be?
A. 5.4 V B. 11.80 V C. 6.6 V D. 0.20 V
In the context of Schwarzschild black holes, the _____ is the boundary between the isolated volume of space-time and the rest of the Universe
A) bridge fragment B) event horizon C) pulsating point D) status curve
Suppose you have 10 helium-filled party balloons tied to a digital camera, so you can take photos of the core of a storm. With 10 balloons the camera will slowly but surely rise. As a storm approaches the atmospheric pressure drops. Assuming the air temperature and density are the same, the volume of each balloon will increase. When you let go, the speed of ascent will be ________.
What will be an ideal response?
Leaving a hot oven door open in a closed room on a cool day
A) decreases room temperature. B) increases room temperature. C) doesn't affect room temperature.