Compared to a clock at the bottom of a very tall skyscraper, a clock at the top of this skyscraper will appear to run
A) slower.
B) faster.
C) the same.
Answer: B
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The entropy of the surroundings remains constant during an adiabatic change even if the change is irreversible
Indicate whether the statement is true or false
Geological evidence points to a few very deep "snowball" phases in Earth's history, in which the oceans would have been mostly frozen. How did Earth recover from a snowball phase?
A) The increased ice coverage on Earth's surface absorbed more sunlight than water and rocks, thus gradually heating Earth until the ice melted. B) Life vanished, leading to an increase in CO2, and increased global warming, eventually melting the ice. C) Volcanoes continued to inject CO2 into Earth's atmosphere, increasing the greenhouse effect to the point where ice melted. D) Plate tectonics gradually subducted all the ice below Earth's surface. E) As the Sun aged, it grew brighter and increased Earth's temperature, melting the ice.
A mass is oscillating on a spring with a period of 4.60 s. At t = 0 s the mass has zero speed and is at x = 8.30 cm. What is its acceleration at t = 2.50 s?
A) 1.33 cm/s2 B) 0.784 cm/s2 C) 11.5 cm/s2 D) 14.9 cm/s2 E) 0 cm/s2
Which of the following compounds should be named using the Stock system?
a. Ag2O b. Au2S c. ZnO d. Al2O3