What are complementary colors of light?
a. Colors that do not blend with one another.
b. Colors that blend together to produce red, green, or blue.
c. Colors that blend together to produce white.
d. Colors that blend together to produce black.
e. Colors that blend together to produce brown.
c
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Three point charges, q1, q2, and q3, are arranged so the potential energy for the pair q1 and q2 is 0.12 J and for the pair q2 and q3 is 0.23 J. What is the potential energy for the pair q1 and q3?
A. 0.11 J B. -0.11J C. 0.35 J D. -0.35 J E. insufficient information is given for a unique answer
Which star has the largest diameter?
a. white dwarf b. main sequence c. red giant d. supergiant e. regular giant
What does the word "normal" mean in the phrase "normal force"?
A) the force that is usually exerted by a surface B) the total force exerted by a surface C) the component of the force exerted by a surface parallel to the surface D) the component of the force exerted by a surface perpendicular to the surface E) the force is due to contact between two objects.
Asteroid Ida was photographed by the Galileo spacecraft in 1993, and the photograph revealed that the asteroid has a small moon, which has been named Dactyl
From the dimensions of Ida and its general features, one can estimate the mass of Ida to be 4.5 × 1016 kg, and the distance between Dactyl and Ida is approximately 90 km. Assuming a circular orbit, what would be the orbital speed of Dactyl? (G = 6.67 × 10-11 N ? m2/kg2 ) A) 2.9 m/s B) 5.8 m/s C) 30 m/s D) 11 m/s E) 2.3 m/s