________ galaxies have smaller nuclei and loosely wound arms compared to ________ galaxies.
A. Sa; Sb
B. Sd; Sc
C. Sa; S0
D. E0; S0
Answer: B
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On the H-R diagram, 90 percent of all stars are _______________
Fill in the blank(s) with correct word
At what temperature is the Celsius temperature and the Fahrenheit temperature are same?
A. 30
B. 35
C. -40
D. 45
E. -30
The Hubble Space Telescope can detect Cepheids up to the distance of 100 Mpc
Indicate whether the statement is true or false
Resistors in Combination: Four unequal resistors are connected in series with each other. Which one of the following statements is correct about this combination?
A. The equivalent resistance is equal to that of any one of the resistors. B. The equivalent resistance is equal to average of the four resistances. C. The equivalent resistance is less than that of the smallest resistor. D. The equivalent resistance is less than that of the largest resistor. E. The equivalent resistance is more than the largest resistance.