Based on our current understanding of physics, we can understand the conditions that prevailed in the early universe as far back in time as about
A) 380,000 years after the Big Bang.
B) one ten-billionth of a second after the Big Bang.
C) 10-45 seconds after the Big Bang.
D) 10 billion years ago.
B
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Two unknown resistors are connected together. When they are connected in series their equivalent resistance is 15 ?. When they are connected in parallel, their equivalent resistance is 3.3 ?. What are the resistances of these resistors?
What will be an ideal response?
Wave Characteristics: The frequency of a microwave signal is 9.76 GHz. What is its wavelength? (c = 3.00 × 108 m/s)
A. 3.07 cm B. 2.07 cm C. 1.07 cm D. 5.07 cm E. 4.07 cm
The buoyant force on an object is:
a. the same for all floating objects. b. equal to a constant that depends on the fluid times the weight of fluid that the object displaces. c. inversely proportional to the weight of fluid displaced by the floating object. d. equal to the weight of fluid that the object displaces. e. a fictitious force.
In terms of energy levels of electrons, a potential well has
a. a negative value. b. a positive or a negative value. c. a positive value. d. none of these.