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
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
The Greek approach to understanding the universe relied mostly on
A) observations B) experiments C) thought and intuition D) preconceived ideas