3 years ago

Why is atmospheric pressure greater at low elevations and less at higher elevations?

1 answer:

6 0

Earth's gravity pulls air as close to the surface as possible. As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level.

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Explain how sound travels through the air to observer

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An object is lifted upward at a constant speed. The gain in potential energy of the object is due to the

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A car traveling 90.0 km/h is 1500 m behind a truck traveling at 76.0 km/h. 1) How long will it take the car to catch up with the

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3 years ago

Represent 0.783 kg with Sl units having an appropriate prefix Express your answer to three significant figures and include the a

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Answer:

783 grams

Explanation:

Here mass is given in kg

Some of the prefixes of the SI units are

1 gram = 10⁻³ kilogram

1 milligram = 10⁻⁶ kilogram

1 microgram = 10⁻⁹ kilogram

1 nanogram = 10⁻¹² kilogram

The number is 0.783

Here, the only solution where the number of significant figures is three is gram. If any other prefix is chosen then the significant figures will increase

$1\ kilogram = 1000\ gram$

$\\\Rightarrow 0.783\ kilogram=0.783\times 1000\ gram\\ =783\ gram$

So, 0.783 kg = 783 grams

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The answer is decrease

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