The ________ is determined by the distance that ________ can travel in a time span equal to the age of the Universe.
A. cosmological constant; neutrinos
B. event horizon; light
C. recession velocity; galaxies
D. cosmic horizon; light
Answer: D
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What color would you select for a container that will hold ice cubes such that the ice is preserved the longest?
a. white b. black c. green d. color doesn't matter
Plane polarized light of intensity 
is passed through a polarizer oriented at 45 
to the original plane of polarization. What is the intensity transmitted?
A. 0.70 
B. 0.50
C. 0.35 
D. 0.25 
E. 0.00
Two different nuclei emit alpha particles, the energy released in each of these decays being the same. Which of the following has the highest resulting kinetic energy?
a. The lighter daughter nucleus. b. The heavier daughter nucleus. c. The alpha particle from the lighter nucleus. d. The alpha particle from the heavier nucleus.
The continuing rise in the carbon dioxide in our atmosphere should cause our surface temperatures to rise
Indicate whether the statement is true or false