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kow [346]
3 years ago
14

A scuba diver diving with an 80 cubic foot tank of air, needs to resurface when his air in the

Mathematics
1 answer:
Burka [1]3 years ago
6 0

At sea level atmospheric pressure is 1 bar absolute (1 standard atmosphere =101 kPa=1.013 bars). The weight of the atmosphere exerts a pressure which will support a column of water 10 m high; 10 m under water the pressure on a diver is 200 kPa. The volume of gas in an early diving bell full of air at sea level is halved at 10 m according to Boyle’s law; at 20 m pressure is 300 kPa absolute and the gas is compressed into one third the volume.

Dry air is composed of roughly 21% oxygen, 78% nitrogen, and 1% other gases. According to Dalton’s law the partial pressure of oxygen at any depth will be 21% of the total pressure exerted by the air and the partial pressure of nitrogen will be 78% of total pressure.

Gases dissolve in the liquid with which they are in contact. Nitrogen is fat soluble and at sea level we have several litres dissolved in our bodies. If the partial pressure of nitrogen is doubled (by breathing air at 10 m depth) for long enough for equilibration to take place we will contain twice as many dissolved nitrogen molecules as at sea level.

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Joan took her three children to the zoo. Admission is $7 each. The snack bar sells water for $2 per bottle and chips for $3 per
lys-0071 [83]

The expression for the total cost of their trip is 7 + 2x + 3y.

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Today Harvey ran 2km more than twice as far as he ran yesterday. Let y= the number of kilometers he ran yesterday. Write an expr
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8 0
3 years ago
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Write in decimal form 7+3/100+9/1000
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3 years ago
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If Jeannie invests $7,250 at a rate of 12%, compounded weekly, find the value of the investment after 10 years. $24,037.59 $16,0
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Hi there!

• Principle amount, P = $ 7, 250

• Rate of interest, r = 12 %

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Aₜ = P [ 1 + (\dfrac {r}{n}) ] ᴺ ˣ ᵀ

A₁₀ = 7, 250 [ 1 + (\dfrac {0.12}{52}) ] ⁵² ˣ ¹⁰

Simplifying :-

A₁₀ = $ 24,037.59

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Option [ 1. ] - $ 24,037.59 is Correct

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