Because the changes in energy levels happen in discrete steps, we refer to these as ________ leaps
Fill in the blank(s) with correct word
quantum
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What is a central dominant galaxy?
A) a galaxy around which many other smaller galaxies orbit B) a giant spiral galaxy that exerts large tidal forces on other nearby galaxies C) a spiral galaxy from which many smaller galaxies form when it is stripped apart by tidal forces D) a giant galaxy with several bright clumps of stars at the center of a dense cluster E) a hypothesized galaxy type that no longer exists, but once dominated the structure of the universe
Who started launching liquid-filled rockets in the United States in 1926?
A) Robert Goddard B) Konstantin Tsiolkovsky C) Hermann Oberth D) Wernher von Braun
An electron is accelerated through 100 kV. By what factor has its mass increased with respect to its rest mass?
A) 1.20 B) 1.55 C) 4.25 D) 6.50 E) 8.00
Pressure (P) waves can travel through a liquid, but shear (S) waves cannot
a. True b. False Indicate whether the statement is true or false