Which of the following molecules would probably be isolated closest to the top of a fractionating tower at a refinery?

A) C4H10
B) C8H18
C) C10H22
D) C20H42
E) C40H82


Answer: A

Physics & Space Science

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For a plane wave approaching an obstacle with a rectangular opening, diffraction becomes important in which of the following circumstances?

A. the beam is coherent B. one or more dimensions of the rectangular opening is near the wavelength of the source C. both dimensions of the rectangular opening are larger than the wavelength of the source D. only if the opening is circular

Physics & Space Science

Determine the equivalent capacitance of the combination shown when C = 12 pF



a.
48 pF

b.
12 pF

c.
24 pF

d.
6.0 pF

e.
59 pF

Physics & Space Science

A 12.0 V battery is placed across a 4.00resistor. If the current through the resistor is 2.80 A, what is the internal resistance of the battery?

A. 0.200
B. 0.290
C. 4.29
D. 3.71
E. 0.800

Physics & Space Science

The most massive stars have masses somewhere around

A) 5 solar masses. B) 10 solar masses. C) 30 solar masses. D) 150 solar masses. E) 3000 solar masses.

Physics & Space Science