Repeatedly tap the side of a drinking glass with a spoon as you fill the glass with water and the pitch of the sound
A) increases.
B) decreases.
C) remains relatively constant.
Answer: B
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How would you reduce the fouling factor?
What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
1. Equation E18.4 
is also solved by a function f (s), where s = t + x/c.
2. One can in principle create a purely electric traveling electromagnetic wave in empty space 
Which is correct?
A.) 24 different kinds of quarks. B.) 12 kinds of quarks and the corresponding 12 kinds of antiquarks. C.) 24 kinds of antileptons. D.) 6 kinds of quarks and the corresponding 6 antiquarks, and 6 kinds of leptons and their 6 corresponding antileptons. E.) 3 quarks and the corresponding 3 antiquarks, 3 leptons and the corresponding 3 antileptons, and 12 other antileptons.
Based on the results from Planck, the overall composition of the universe is
A) 100% ordinary (baryonic) matter. B) 15% ordinary (baryonic) matter, 85% nonbaryonic dark matter. C) 1% ordinary (baryonic) matter, 99% nonbaryonic dark matter. D) 4% ordinary (baryonic) matter, 23% nonbaryonic dark matter, 73% dark energy.