A lunar eclipse can only happen during a:
A) new moon.
B) equinox.
C) full moon.
D) perigee.
E) aphelion.
C
Physics & Space Science
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Our Sun is a star of spectral type
A) F. B) M. C) G. D) S.
Physics & Space Science
Which is the largest planet?
A. Uranus B. Jupiter C. Earth D. Neptune E. Saturn
Physics & Space Science
Compared to a sound of 40 decibels, the intensity of a sound of 50 decibels is
A) 10 times as much. B) 100 times as much. C) 1000 times as much. D) 10,000 times as much. E) more than 10,000 times as much.
Physics & Space Science
Being the ideal engine, the maximum COP of a Carnot cycle operated in reverse as a refrigerator is
A) (Th/Tc)(1 – Tc/Th)-1. B) 100. C) (1 – Tc/Th)-1. D) (Tc/Th) ? (1 – Tc/Th)-1.
Physics & Space Science