Instructions: On occasion, the notation 
will be a shorthand notation for 
.
The diagram below shows 3 vectors which sum to zero, all of equal length. Which statement below is true?
?
?
A.
B.
C.
D.
E.
Answer: D
Physics & Space Science
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If someone tells you they have a sample of niobium-90, can you tell how many neutrons are in the nucleus?
a. Yes, there are 41 neutrons. b. Yes, there are 90 neutrons. c. Yes, there are 49 neutrons. d. No, more information must be given. e. No, there is no such thing as "niobium.".
Physics & Space Science
What is partial melting?
What will be an ideal response?
Physics & Space Science
What do you call the first day of spring?
A. Vernal Equinox B. Solstice C. New Moon D. June 21 E. Autumn
Physics & Space Science
The total kinetic and potential energies of all the atoms and molecules of a substance is its
a. heat. b. internal energy. c. temperature. d. thermodynamics. e. none of the above
Physics & Space Science