Variables of a certain type are called Cepheid variables because the first one discovered was in the _____________ Cepheus
Fill in the blank(s) with correct word
constellation
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Temperature Scales: Oxygen condenses into a liquid at approximately 90 K. What temperature, in degrees Fahrenheit, does this correspond to?
A. -193°F B. -217°F C. -265°F D. -297°F
The Greek approach to understanding the universe relied mostly on
A) observations B) experiments C) thought and intuition D) preconceived ideas
Ariel claims that a pulse is described by the equation where x and y are measured in cm and t in s. Miranda says that it is not possible to represent a pulse with this function because a wave must be a function of x + vt or x ? vt. Which one, if either, is correct, and why?
a. Ariel, because x2 – 6.0xt + 9t2 = (x – 3.0t)2. b. Ariel, because a pulse is not an infinite wave. c. Miranda, because (x – 3.0t)2 is the same as (3.0t – x)2. d. Miranda, because a pulse is not an infinite wave. e. Miranda, because is infinite when x = 0.
Two isotopes have the same
a. mass number b. neutron number c. atomic number d. quantum number e. none of the above