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4 years ago

Why do wee see lightning before we hear thunder?

2 answers:

7 0

Lightning travels at a speed of 300,000,000 meters per second, which is about 186,000 miles per second. The speed of sound, in dry air, is about 1 mile every 5 seconds. Since dry air is not common during a thunderstorm, the speed at which thunder travels is only an approximation, but a rough calculation can still be made of the distance of a thunderstorm by comparing the time factors of lightning and its accompanying thunder. Because the speed of light is so fast, the travel time for lightning in the case of a thunderstorm's relatively close distance can be considered instantaneous. Thus, counting the elapsed time in seconds between the flash of lightning and the following thunder, and then dividing that number by 5, will provide the distance in miles. If, for example, 10 seconds pass between the lightning and the thunder, the storm is 2 miles away.

Arlecino [84]4 years ago

3 0

Once then light is gone the air collapses back in and creates a sound wave that we hear as thunder. The reason we see lightning before we hear thunder is because light travels faster than sound!

that is why

i hope my answer helped you

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Find the weight of the same object on a planet where the gravitational attraction has been reduced to 1/10 of the earth’s pull.

nexus9112 [7]

Its a ten if u didn't have gravitional pull u wouldn't be on earth

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3 years ago

Unpolarized light is passed through three successive Polaroid filters, each with its transmission axis at 45.0° to the preceding

allsm [11]

Answer:

The percentage is $k = 12.5 \%$

Explanation:

From the question we are told that

The axis is is at $\theta = 45 ^o$

Generally the of intensity light emerging from the first polarizer is mathematically represented as

$I_{1} = \frac{I_o}{ 2}$

Where $I_o$ is the intensity of unpolarized light

Now the light emerging from the second polarizer is mathematically represented as

$I_2 = I_ 1 * cos ^2(\theta )$

$I_2 = \frac{I_o}{2} * cos ^2(45 )$

$I_2 = \frac{I_o}{2} * \frac{1}{2} = \frac{I_o}{4}$

Now the light emerging from the third polarizer is mathematically represented as

$I_3 = I_ 2 * cos ^2(\theta )$

$I_3 = \frac{I_o}{4} * cos ^2(45 )$

$I_3 = \frac{I_o}{8}$

Now the percentage of the intensity of light that emerged with respect to the intensity of the unpolarized light is

$k = \frac{\frac{I_o}{8} }{I_o } * 100$

$k = 12.5 \%$

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4 years ago

Finish this equation useing the term "average speed" and "time interval ": total distance =

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Total distance during the time interval =

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3 years ago

Read 2 more answers

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Answer:

importance of measurement is it gives proper required amount of anything if it will not exist then alot of work be disrupted .In many work measurement is very necessary like in scientific works

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3 years ago

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Answer:

Option c. Correlational

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It seeks to understand, measure and make assessment of the relationship or

association between these variables but can not find out if a variable is caused by the other variable.

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4 years ago