DNA is coiled into a tight spiral and makes up the ____ that are the genetic material in a cell
a. genes
b. amino acids
c. enzymes
d. nucleus
e. chromosomes
E
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A racecar driver steps on the gas, changing his speed from 10 m/s to 30 m/s in 4 seconds. The acceleration of the racecar is
a. 0 b. 2 m/s2. c. 4 m/s2. d. 5 m/s2. e. 7.5 m/s2.
Microtechnology began
A) about 60 years ago with the invention of solid state transistors. B) in the 1990s with the use of computers. C) with the development of micron chemistry in the early 1800s. D) at the close of World War II.
If 2.0 g of water at 0.00°C is to be vaporized, how much heat must be added to it? The specific heat of water is 1.0 cal/g ? K, its heat of fusion is 80 cal/g, and its heat of vaporization is 539 cal/g
A) 1100 cal B) 1100 kcal C) 1200 cal D) 1300 cal E) 1500 cal
What primary wavelength and corresponding photon energy is emitted by a body at: (a) 400.°C? (b) 800.°C? (c) 1200.°C?
What will be an ideal response?