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OlgaM077 [116]
3 years ago
11

To estimate the distance in kilometers of a flash of lightning, count the number of seconds between seeing the flash and hearing

the accompanying thunder, then divide by:__________
Physics
1 answer:
Triss [41]3 years ago
8 0

Answer:

Divide by 3

Explanation:

In order to estimate the distance traveled by a lightening flash in kilometers, we follow these simple steps:

  1. Make a count of the number of seconds in between the period a flash occur and the thunder accompanied by the lightening flash is heard.
  2. Dive the total number of seconds by 3 to get the distance traveled by the flash. This is because in order to cover 1 km, it roughly takes 3 seconds.
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sorry - late reply...just stumbled across tis...hope u can still use it :)


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<span>
</span>

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and do = distance to object = +8cm


Substitute and solve for f, the focal length

<span><span>
1/12 + 1/8 = 1/f
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1/f = (8 + 12) / 12 * 8 = 20/96
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so f = 96/20 = 4.8 cm</span>
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