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Greeley [361]
3 years ago
11

Why do people tend to cup their hands around listeners' ears when whispering to them? A) A cupped hand makes the sound echo so t

he listener can hear more clearly. B) The ear cannot absorb sound waves produced by a whisper without a cupped hand. C) Solid objects, such as a cupped hand, can direct sound waves into the ear of the listener. D) Sound waves from a whisper are short; they will not reach the listener's ear unless guided by a hand. Eliminate
Physics
2 answers:
WITCHER [35]3 years ago
6 0
C. Hope this helps you!
pashok25 [27]3 years ago
4 0

Answer: Option (C) is the correct answer.

Explanation:

In solids, sound travels faster because in solids the molecules are much more closer to each other as compared to liquids and gases.

Hence, distance between molecules is the minimum in solids and sound passes from one molecule to another easily.

Thus, we can conclude that people tend to cup their hands around listeners' ears when whispering to them because solid objects, such as a cupped hand, can direct sound waves into the ear of the listener.  

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Answer:

A) The continents and ocean basins undergo continuous change. Both are parts of lithospheric plates that move against each other. B) Divergent plate in Mid-Atlantic Ridge with material flowing into the ocean. C)  A plate moved over a stationary site of magma upwelling "Hot Spot" and created a volcanic island chain over the time

Explanation:

A) The basic thought is, that instead of being permanent fixtures of the earth's surface, the continents and ocean basins undergo continuous change. Both are parts of lithospheric plates that move against each other, and in the process new crust is created at midoceanic ridges (spreading centers), and old crust is consumed at convergent plate boundaries (subduction zones).

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Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other.

The best known of the divergent boundaries is the Mid-Atlantic Ridge. This submerged mountain range, which extends from the Arctic Ocean to beyond the southern tip of Africa, is but one segment of the global mid-ocean ridge system that encircles the Earth.

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What rock type does the principle of superposition apply to and how is the principle of superposition used to study the history
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