How many molecules are there in 14 grams of nitrogen gas?
a. NA/2 b. NA
c. 2 NA d. The answer is not given.
a
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Shown below are the four terrestrial planets of our solar system. Assume that all the planets started out equally hot inside. Rank the planets based on their expected cooling rates, from fastest cooling to slowest cooling.
The kind of waves that travel fastest through a long metal rod have
A) short wavelengths. B) waves of medium length. C) long wavelengths. D) all have the same speed
The resolving power of a microscope refers to the ability to
A) distinguish objects of different colors. B) form clear images of two points that are very close together. C) form a very large image. D) form a very bright image. E) form a very microscopic image.
A charge (uniform linear density = 9.0 nC/m) is distributed along the x axis from x = 0 to x = 3.0 m. Determine the magnitude of the electric field at a point on the x axis with x = 4.0 m
a. 81 N/C b. 74 N/C c. 61 N/C d. 88 N/C e. 20 N/C