All stars are born with the same basic composition, yet stars can look quite different from one another. Which two factors primarily determine the characteristics of a star?
A) its mass and its stage of life
B) its apparent brightness and its distance
C) its age and its location in the galaxy
D) its mass and its surface temperature
E) its apparent brightness and its luminosity
A
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Consider the hypothetical discovery from Part A reading: "A star's 5 terrestrial planets orbit in the opposite direction of its 3 jovian planets." This discovery would be inconsistent with the nebular theory because the theory holds that __________.
a. terrestrial planets should orbit in a different plane from the plane of the jovian planets b. all the planets formed in a rotating, disk-shaped nebula c. star systems should have equal numbers of terrestrial and jovian planets
Stars evolve to the upper left along the main sequence, after forming in the middle
Indicate whether the statement is true or false
Consider a parallel-plate capacitor with a dielectric material between the plates. If the temperature of the dielectric increases, the capacitance
1.increase 2.decrease 3.remains the same
The amplitude of a 3.00-kg object in simple harmonic motion is 6.00 m. The maximum acceleration of the object is 5.00 m/s2. What is the period of simple harmonic motion?
A) 6.88 s B) 1.20 s C) 0.278 s D) 0.833 s E) 7.54 s