If R = 4.0 k?, C = 3.0 mF, ? = 15 V, Q = 12 mC, and I = 2.0 mA, what is the potential difference Vb?Va?
A. +3.0 V
B. ?19 V
C. ?3.0 V
D. +27 V
E. +21 V
Answer: C
You might also like to view...
What is happening deep inside a star while it expands into a subgiant?
A) It is fusing hydrogen to produce helium in the core. B) It is fusing hydrogen to produce helium in a shell around the core. C) It is fusing helium to produce carbon in the core. D) It is fusing helium to produce carbon in a shell around the core. E) It is not fusing any element; it is contracting and heating up.
The primary evidence for an accelerating Universe comes from observations of young stars in the Milky Way.
A.) True, observations show that there were many more young, massive stars in the early Universe. B.) True, massive star supernovae allow us to measure the expansion rate of the Universe. C.) False, in order to measure accelerating expansion, we need to measure the distances of objects billions of light-years away. D.) False, evidence for an accelerating Universe comes from observations of the oldest stars in the Milky Way, white dwarfs. E.) False, we have to look at young stars in other galaxies beyond the Milky Way to measure the acceleration of the Universe.
Joe's toaster broke. He bought a toaster oven to replace it, telling his wife Annie that it is cheaper to make toast in the toaster oven than in the range's oven
Toast takes 5 minutes to cook in the toaster oven while it takes only 3 minutes in the range's oven. Is Joe right or is Annie, who says they've wasted their money? Explain.
A 2000 V/m electric field is directed along the +x-axis. If the potential at x = 10 m is 800 V, what is the potential at x = 6 m?
A) 8800 V B) 2000 V C) 7200 V D) 4400 V E) 1600 V