How can a white dwarf be hotter than our Sun, yet much less luminous?
What will be an ideal response?
They are only about as big as Earth, so their surface area is about 10,000X less than the Sun's.
Physics & Space Science
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Which of the following colors travels most quickly through glass or plastic?
A. green B. red C. blue D. orange E. yellow
Physics & Space Science
A string is stretched and fixed at both ends, 200 cm apart. If the density of the string is 0.015 g/cm, and its tension is 600 N, what is the wavelength (in cm) of the first harmonic?
A. 600 B. 400 C. 800 D. 1000 E. 200
Physics & Space Science
How much power is being dissipated by one of the 10-? resistors?
a.
24 W
b.
9.6 W
c.
16 W
d.
6.4 W
Physics & Space Science
The rate of flow of electric charge is
a. voltage b. current c. resistance d. electric field e. critical temperature
Physics & Space Science