Which of the following spectral types is more likely to be a flare star?

A) KIII
B) MV
C) GV
D) I
E) BII


B

Physics & Space Science

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The sun has a radius ofkm and a rotational period of 25.38 days. What is the difference is there in the peak of the observed spectrum between light received from the approaching side of the Sun and from the receding side of the sun? Observations from the middle of the sun place the spectral peak at 480 nm.

A. 13 nm B. 6.4 nm C. 1.6 nm D. 3.2 nm

Physics & Space Science

A 2.0 ?F capacitor is charged through a 50,000. ? resistor. How long does it take for the capacitor to reach 90% of full charge?

A) 2.19 s B) 0.23 s C) 0.9 s D) 9.1 s E) 2.3 s

Physics & Space Science

In quantum tunneling, electrons and other quantum particles can tunnel through a region of space that would be forbidden to them if they were classical particles

Indicate whether the statement is true or false

Physics & Space Science

I detect a star giving off more ultraviolet light than green light. What property of the star can I estimate with this information?

a) Its chemical composition b) Its temperature c) Its density d) Its age e) Its distance from Earth

Physics & Space Science