To keep chickens in a chicken coop warm, the kind of lamp to use is

A) fluorescent.
B) CFL.
C) incandescent.
D) LED.
E) all about the same


Answer: C

Physics & Space Science

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Pulsars cannot be spinning white dwarfs because

a. white dwarfs are not that common. b. white dwarfs are not dense enough. c. white dwarfs do not have magnetic fields. d. a white dwarf spinning that fast would fly apart. e. all of the above

Physics & Space Science

You can hear sound through an open window from sources that are not in your line of sight because of __________

Fill in the blank(s) with correct word

Physics & Space Science

What is the maximum possible angular magnification of the converging lens of focal length 5 cm for a person with normal vision?

A) 2 B) 3 C) 4 D) 6 E) 5

Physics & Space Science

Potassium Iodide (chemical formula: KI) has a face-centered cubic structure (just like sodium chloride). If the distance between crystal planes is d = 0.353 nm and X-rays of wavelength l = 0.093 4 nm are used, what is the smallest angle q at which a diffraction maximum may be obtained?

a. 9.92° b. 7.60° c. 13.3° d. 15.5° e. 6.52°

Physics & Space Science