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Rama09 [41]
3 years ago
13

Please help anyone ASAP You can listen to your friend round a corner, but you cannot watch him/her .Why? Related to sound

Physics
1 answer:
asambeis [7]3 years ago
6 0

Answer:

The sound waves have larger wavelength than light waves. These are diffracted by the corner of wall and light waves cannot do so, due to their very small wavelength (as compared with size of wall corner). So, without seeing the friends his/her voice can be heard.

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A distant galaxy has a redshift z = 5.82 and a recessional velocity vr = 287,000 km/s (about 96% of the speed of light.) Notice
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Answer: 4100 Mpc

Explanation:

Since H o = 70 km/s/Mpc

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Then, the distance to the galaxy in light years will be:

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Scientific notation for 836
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It takes Mars about ____ Earth years to orbit the Sun.
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3 years ago
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