The colors of a neon light arise because it is a(n) ________ spectrum
Fill in the blank(s) with correct word
emission (or bright line)
Physics & Space Science
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The diffusion constant for water in air is 
What is the distance a water molecule can travel by diffusion in 10min?
A. 17 cm B. 20 cm C. 25 cm D. 31 cm E. 36 cm
Physics & Space Science
A pair of sunglasses and a pair of clear reading glasses are left in the sunlight. The hotter glasses will be the
A) sunglasses. B) reading glasses. C) both of these D) neither of these
Physics & Space Science
The electrical conductivity of a metal is not proportional to which of the following?
(a) Free-electron density (b) Electron mobility (c) Electron charge (d) Atomic number
Physics & Space Science
Which is brighter in our sky, a star with apparent magnitude 2 or a star with apparent magnitude 7? By how much is the star brighter?
What will be an ideal response?
Physics & Space Science