Which of the above would best describe how soap behaves in water?
A) a
B) b
C) c
D) d
E) none of the above
Answer: D
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A 2 inch diameter fluorescent light is mounted horizontally as shown. Estimate the heat transfer per unit area if the light surface is 85ºF and the surrounding air is 65ºF.
Which main-sequence star has the lowest mass?
A) M B) G C) A D) O E) Can't tell from information provided.
A helium balloon rises because of __________ principle
Fill in the blank(s) with correct word
A stopping potential of 0.50 V is required when a phototube is illuminated with monochromatic light of wavelength 590 nm
Monochromatic light of a different wavelength is now shown on the tube, and the stopping potential is measured to be 2.30 V. What is the wavelength of this new light? (c = 3.00 × 108 m/s, e = - 1.60 × 10-19 C, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 320 nm B) 300 nm C) 340 nm D) 360 nm E) 410 nm