The change in electric potential energy, Ub - Ua, is the work done on a charge by the electric force as it moves from point a to point b
Indicate whether the statement is true or false
FALSE
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The Ga-As phase diagram has a compound GaAs (?-phase) that is a single vertical line at 50 atomic % As. Can ?-phase be produced that has 55 atomic % As? _____________
Fill in the blank(s) with the appropriate word(s).
Refrigerator magnets are typically
A) short range. B) long range. C) none of these
The amount and distribution of matter in the Milky Way Galaxy is determined by
A) counting the number of stars in the galaxy. B) determining the amount of gas and dust in the galaxy. C) studying where stars are located in the Milky Way. D) studying the rotation of the galaxy. E) adding together the mass of the galaxy's stars and gas.
Compared to the average size of a hydrogen atom, the average size of a helium atom is
A) larger. B) smaller. C) about the same.