Which stars have convective cores?
A) low-mass stars
B) intermediate-mass stars
C) high-mass stars
D) all of the above
E) none of the above
C
Physics & Space Science
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A transformer for a laptop computer converts a 120-V input to a 24-V output. Compared with the number of turns on the primary coil, the secondary has
A) 1/5 as many turns. B) 5 times as many turns. C) the same number of turns. D) none of the above
Physics & Space Science
All radio telescopes are reflectors in design
Indicate whether the statement is true or false
Physics & Space Science
If a surface is illuminated by magenta light and the red is absorbed, then the color of the surface will appear as
A. green. B. yellow. C. blue. D. red.
Physics & Space Science
The seriousness of an asteroid collision is gauged by the ______________ scale
a. Torino b. Richter c. Decibel d. Sunami e. Star
Physics & Space Science