What is the potential difference across C2 when C1 = 5.0 ?F, C2 = 15 ?F, C3 = 30 ?F, and V0 = 24 V?
A. 21 V
B. 19 V
C. 16 V
D. 24 V
E. 8.0 V
Answer: C
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Standing Sound Waves: One of the harmonics of a column of air in a tube that is open at one end and closed at the other has a frequency of 448 Hz, and the next higher harmonic has a frequency of 576 Hz. How long is the tube? The speed of sound in air is 343 m/s.
A. 1.34 m B. 0.670 m C. 0.335 m D. 1.00 m E. 2.68 m
Why do we experience night and day on Earth?
A) Earth rotates on its axis once every 24 hours. B) The Sun orbits Earth once every 24 hours. C) The Moon circles Earth once every 24 hours. D) The Sun moves around in a circle once every 24 hours, shining like a spotlight on Earth.
How does the heat energy from the Sun reach us through the vacuum of space?
a. conduction b. radiation c. convection d. none of the above choices are valid
The electric field strength in the space between two closely spaced parallel disks is 1.0 × 105 N/C. This field is the result of transferring 3.9 × 109 electrons from one disk to the other
What is the diameter of the disks? (e = 1.60 × 10-19 C, ?0 = 8.85 × 10-12 C2/N ? m2) A) 3.0 cm B) 1.5 cm C) 4.5 cm D) 6.0 cm