To which group of polymers does nylon belong?
a. Natural
b. Hydrolytic
c. Addition
d. Condensation
d
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If helium nuclei and protons are each accelerated from rest through the same potential difference V, which gets the greatest kinetic energy and by what factor is it greater?
A. the protons get twice as much kinetic energy B. the helium nuclei get twice as much kinetic energy C. they both get the same kinetic energy D. the protons get four times as much kinetic energy E. the helium nuclei get four times as much kinetic energy
The Local Group is ________.
A. a cluster of galaxies in which the Milky Way is located B. a star cluster to which the Sun belongs C. the group of planets around the Sun D. the name of the spiral arm of our Galaxy in which the Sun is located
Life will most likely be able to appear and evolve on a planet around which stage of a star's life?
A) core hydrogen-fusion B) shell helium-fusion C) core helium-fusion D) shell hydrogen-fusion
When referring to the "cgs" system, what does the "c", the "g", and the "s" stand for?
What will be an ideal response?