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4 years ago

Why might your ears pop when you travel up a mountainside or fly in an airplane?

2 answers:

4 0

Your ears pop in airplanes because the air high above the surface of Earth is The High pressure when you are going up into the air

puteri [66]4 years ago

3 0

The pressure up in the plane or on a mountain is lower than the pressure at ground level. Since the air pressure is lower, that means some of the trapped air in your inner ear must escape to stabilize the pressure (so the pressure in your ear is equal to the lower pressure outside). As a result, your ears 'pop' to let out that trapped air in your ears and ensure that the pressure in your ear is equal to the pressure outside.

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If the copper is drawn into wire whose diameter is 9.50 mm, how many feet of copper can be obtained from the ingot? The density

ankoles [38]

Answer:

The length of the wire = 352.66 feet.

Explanation:

A copper refinery produces a copper ingot weighing 150 lb. If the copper is drawn into wire whose diameter is 9.50 mm, how many feet of copper can be obtained from the ingot? The density of copper is 8.94 g/cm3. (Assume that the wire is a cylinder whose volume is V = πr2h, where r is the radius and h is its height or length.)

Step 1: Convert lb to kg

150 lb = 68.0389 kg

Step 2: Calculate volume of copper

Volume = mass / density

Volume = 68038.9 grams / 8.94 g/cm³

Volume = 7610.6 cm³ Cu

Step 3: Calculate length of wire

The diameter of the wire is 9.50 mm, so the radius is half of that (4.75 mm), or 0.475 cm.

The total "volume" of the wire is πr²h = (π)*(0.475 cm)²(h) = 0.708h = 7610 cm^3

7610 = 0.708h

h = 10749 cm = length of wire

The length of the wire = 352.66 feet.

7 0

4 years ago

The burning of coal, a fossil fuel, produces water and carbon dioxide. How is this similar to cellular respiration?

Mrac [35]

Answer:

I think the answer is C but you might need a second opinion on this answer

6 0

3 years ago

Read 2 more answers

When water vapor changes to a liquid what is it called

Mademuasel [1]

Answer:

$hello \: your \: answer \: is \: here.$

Explanation:

<h2>Condensation is the change of water from its gaseous form (water vapor) into liquid water. Condensation generally occurs in the atmosphere when warm air rises, cools and looses its capacity to hold water vapor. As a result, excess water vapor condenses to form cloud droplets.</h2>

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5 0

3 years ago

How is 1 hectoliter different from 1 kiloliter?

LUCKY_DIMON [66]

1 hectoliter is 26.4172

1 kiloliter is 264.172

5 0

3 years ago

Read 2 more answers

What is agovado constant

kirza4 [7]

6.02214086 x 10^23 mol^-1

7 0

3 years ago