Which of the following is not matter?
a. Air
b. Heat
c. Charcoal
d. Electrons
b
Physics & Space Science
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The observed acceleration of the expansion of the Universe is evidence that some form of energy, either a cosmological constant or quintessence, is spread throughout space
Indicate whether the statement is true or false
Physics & Space Science
Diamond, graphite, and buckyballs are
a. isotopes. b. allotropes. c. isomeres. d. diatomic.
Physics & Space Science
Use the band theory of semiconductors to choose the most correct statement below
Physics & Space Science
High voltages are desirable for long distance transmission of electric power because
A. the higher the voltage the higher the current, which reduces the power lost B. the higher the voltage, the lower the current, which reduces the power lost C. the higher the voltage the less concern there is for safety
Physics & Space Science