If you increase the tension of a string the velocity of the wave in the string
A. increases
B. decreases
C. does not change
A. increases
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A particle (charge = 50 ?C) moves in a region where the only force on it is an electric force. As the particle moves 25 cm from point A to point B, its kinetic energy increases by 1.5 mJ. Determine the electric potential difference, VB ? VA
a. ?50 V b. ?40 V c. ?30 V d. ?60 V e. +15 V
Star A is a main sequence star of spectral type G5 and star B is a red giant of spectral type K2. Which statement below is correct?
A) Star A appears brighter than star B. B) Star B appears brighter than star A. C) Star A is hotter than star B. D) Star B is hotter than star A. E) None of the above can be said about these two stars.
A solution in which more of the solute could be dissolved at the same temperature is called a(n) ______________ solution
Fill in the blank(s) with correct word
How do the stellar winds of young Sun-like stars compare to the solar wind we see from the Sun today?
a. Young stars don’t have winds. b. Young stars have weaker winds. c. Young stars have much stronger winds.