The determination of the composition of a material by bombarding it with neutrons and monitoring the emitted radiation is
a. nuclear fission analysis
b. nuclear fusion analysis
c. neutron activation analysis
d. nuclear emission analysis
e. beta decay analysis
C
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Which of the following statements about circumpolar stars is true at all latitudes?
A) They are the stars close to the north celestial pole. B) They always remain above your horizon. C) They make relatively small circles, traveling clockwise around the north celestial pole. D) Like all other stars, they rise in the east and set in the west. E) You cannot see them from the Southern Hemisphere.
Fiber-optic cable relies upon _________ to keep all of the light in the cable.
Fill in the blank(s) with the appropriate word(s).
A ball thrown upwards reaches a maximum height and then comes back down to the original level. As the ball is going upwards, the velocity points __________ and the acceleration points __________
Fill in the blank(s) with correct word
What are the "rungs" of a DNA spiral made up of?
a. RNA b. four chemical bases arranged in pairs c. enzymes d. ribosomes e. proteins