Five moles of an ideal gas expands isothermally at 100°C to five times its initial volume. Find the heat flow into the system
a. 2.5 × 10^4 J
b. 1.1 × 10^4 J
c. 6.7 × 10^3 J
d. 2.9 × 10^3 J
e. 7.0 × 10^2 J
A
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Exclusion Principle: The orbital angular momentum quantum number can take which of the following values for any given value of the principal quantum number, n?
A. ? = 0, 1, 2, . . . B. ? = 0, 1, 2, . . . , n C. ? = 0, 1, 2, . . . , (n - 1) D. ? = 1, 2, 3, 4, . . . E. ? = 1, 2, 3, 4, . . ., (n + 1)
Which of the following is true of life on Earth?
A) Life, in the form of multicellular organisms, has existed on Earth for only about 2 million years. B) Life has existed on Earth for at least 3.4 billion years. C) The Cambrian explosion marks the formation of the first unicellular organisms on Earth. D) Complex multicellular organisms were present on Earth 2.5 billion years ago.
A 10 kg ball weighs 98 N in air and weighs 75 N when submerged in water. The buoyant force of the water on the ball is
A. 32 N. B. 30 N. C. 24 N. D. 23 N. E. 19 N.
What is the approximate volume of an adult human’s head.
A. 0.1 
B. 0.001
C. 0.005
D. 0.01
E. 0.05