Every second at Niagara Falls, some 5 000 m3 of water falls a distance of 50 m. What is the increase in entropy per second due to the falling water? (Assume a 20°C environment)
8 360 kJ/K
Physics & Space Science
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The average size of a white dwarf is about the same size as the Earth
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
A laser beam strikes a plane reflecting surface with an angle of incidence of 37°. What is the angle between the incident ray and the reflected ray?
What will be an ideal response?
Physics & Space Science
The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III
?
The object’s velocity is never negative.
a.
True
b.
False
Physics & Space Science
Stream velocity is faster in a
A) flat bottomed, shallow stream channel. B) rounded, relatively deep stream channel. C) stream with a very steep gradient. D) canyon.
Physics & Space Science