The parallax of a star is ________ usually measured in ________.
A. a distance; AUs
B. an angle; arc seconds
C. a distance; arc seconds
D. an angle; parsecs
Answer: B
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Latent Heats: The melting point of aluminum is 660°C, its latent heat of fusion is 4.00 × 105 J/kg, and its specific heat is 900 J/kg ? K. If 300 kJ of heat are added to 442 g of aluminum at 100°C, what is the final state of the system? That is, how much is liquid, how much is solid, and what is its temperature?
What will be an ideal response?
Why does the Moon lack a true atmosphere?
What will be an ideal response?
Besides mass the other factor that influences where a star appears on the main sequence is:
A) distance from Earth. B) number of stars in the cluster. C) chemical composition of the cloud. D) the motion of the star. E) the type of cluster the star is formed in.
A single slit forms a diffraction pattern with monochromatic light. The fourth minimum of the pattern occurs at an angle of 32° from the central maximum. The angle at which the fifth minimum of the pattern occurs is closest to:
A) 41.5° B) 41.0° C) 40.5° D) 42.0° E) 42.5°