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