Which of the following frequencies could NOT be present as a standing wave in a 2m long organ pipe open at both ends? The fundamental frequency is 85 Hz
a. 85 Hz.
b. 170 Hz.
c. 255 Hz.
d. 340 Hz.
e. 382 Hz.
E
Physics & Space Science
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A sphere of surface area 1.25 m2 and emissivity 1.0 is at a temperature of 100°C. At what rate does it radiate heat into empty space? (? = 5.67 × 10-8 W/m2 ? K4)
A) 7.1 W B) 0.71 mW C) 1.4 kW D) 9.9 mW E) 3.7 W
Physics & Space Science
The number of electrons delivered daily by power utilities to an average American home during a typical week is
A) zero. B) 110. C) 220. D) billions of billions. E) none of the above
Physics & Space Science
What is meant by an adiabatic surface?
What will be an ideal response?
Physics & Space Science
Consider the following statement, and explain whether or not it is sensible: Last night I saw Mars move westward through the sky in its apparent retrograde motion
What will be an ideal response?
Physics & Space Science