Wien's law allows astronomers to measure what property of a star?
A. the chemical composition of the star
B. the surface temperature of the star
C. the distance to the star
D. All of these choices are correct.
Answer: B
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A box slides down a 25.0° slope under its own weight. The coefficient of kinetic friction between the box and the slope is 0.350. What is the acceleration of the box?
A) 1.03 m/s2 B) 2.06 m/s2 C) 1.22 m/s2 D) 2.20 m/s2 E) 2.44 m/s2
Six trillion miles is equivalent in distance to one ______________
a. light-year b. astronomical unit c. parsec d. billion meters
A 20-?F capacitor charged to 2.0 kV and a 40-?F capacitor charged to 3.0 kV are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 20-?F capacitor after the two are so connected?
a. 53 mC b. 27 mC c. 40 mC d. 80 mC e. 39 mC
Describe the large impact theory of the Moon's origin
What will be an ideal response?