The main reason for the large inefficiency of the automobile is
A) the kinetic principle.
B) friction in the moving parts.
C) the first law of thermodynamics.
D) the second law of thermodynamics.
E) unburned hydrocarbons.
D
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The ____________________ period of the moon is the time required for one revolution of the moon around Earth with respect to the stars
Fill in the blank(s) with correct word
LMC X-3 is a binary system that is believed to contain a black hole
a. True b. False Indicate whether the statement is true or false
What causes stars to twinkle?
A) Stars constantly vary in brightness as they expand and contract. B) Interstellar gas along the line of sight to the star absorbs different amounts of radiation. C) The human eye has difficulty seeing faint objects. D) Moving gases in Earth's atmosphere randomly bend light rays from stars.
An aluminum rod 17.400 cm long at 20°C is heated to 100°C. What is its new length? Aluminum has a linear expansion coefficient of 25 × 10-6 K-1
A) 17.435 cm B) 17.365 cm C) 0.348 cm D) 0.0348 cm