A person squeezes a balloon horizontally with both hands while holding it at rest, decreasing its width by a certain amount. Is the work done on the balloon by the person positive, negative, or zero?
A. Positive
B. Negative
C. Zero
D. One needs more information to answer.
A. Positive
Physics & Space Science
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If the speed of light in a sphere is 2 x 10^8 m/s, its index of refraction is
a. 1.0 b. .67 c. 2.0 d. .50 e. 1.5
Physics & Space Science
Give three examples of three-dimensional waves
What will be an ideal response?
Physics & Space Science
Entropy: What is the change in entropy of the lead when 2.0 kg of molten lead at its melting point temperature solidifies? For lead: LV = 207 kcal/kg at 1744°C, LF = 5.9 kcal/kg at 328°C.
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
Two tuning forks produce sounds of wavelengths 3.4 meters and 3.3 meters. Approximately what beat frequency is produced?
A) 0.1 hertz B) 1.0 hertz C) 2.0 hertz D) 3.0 hertz E) 4.0 hertz
Physics & Space Science