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postnew [5]
4 years ago
9

Balloons are sometimes filled with helium gas because it has a mass only about one-seventh that of air under identical condition

s. The buoyancy force, which may be expressed as Fb = ????air g Vballoon, will push the balloon upward. If the balloon has a diameter of 10 m and carries two people having a mass of 70 kg each and the mass of the gondola is 64 kg, determine the acceleration of the balloon when it is first released. Assume that the density of the air is ????air = 1.16 kg/m3 , and neglect the weight of the ropes and balloon envelope fab
Physics
1 answer:
SpyIntel [72]4 years ago
5 0

Answer:

10.1 m /s²

Explanation:

Let m₁ be the mass of the helium gas inside balloon. Mass of air displaced  is m₂

m₁ = volume x density

= 4/3 x 3.14 x 5³ x .179

= 93.67  kg

mass of displaced air

= 4/3 x 3.14 x 5³ x 1.16

= 607.06 kg

Net buoyant force in upward direction

(607.06 - 93.67 ) x g

= 5031.22 N

weight of people and gondola

= (2 x 70 + 64 ) x 9.8

= 1999.2 N

Net force in upward direction

= 5031.22 - 1999.2

= 3032.02 N

Acceleration produced

= 3032.02 / total mass

= 3032.02 / ( 93.67 +204 )

= 3032.02 / 297.67

= 10.1 m /s²

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cricket20 [7]

Answer:

Explanation:

Let the resistance of resistor be R .

Power of resistor  V² / R , where V is potential applied .

V² / R = 100

120² / R = 100

R = 120² / 100

= 144 ohm .

Now potential diff applied = 220 V

current = potential diff / resistance

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6 0
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myrzilka [38]

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Explanation:

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3 years ago
How many chicken feet hatch from 3 dozen eggs? Explain.
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5 0
3 years ago
A compound is discovered and its molecular weight is determined to be 526g/mol. however, one of the elements has not yet been id
AfilCa [17]

Sulphur

The missing element is sulphur

Here the compound is composed of  element X and chlorine.

it is given,

XCl (6) ----> 6Cl

mass = 13.1%

it is X and Cl = 100%-13.10%

                     = 86.90%

chlorine = 86.90            

X = 13.10

We assume 100g of sample

so according to the above solved data, in 100g of sample we have 86.90 g of chlorine.

now we split that chlorine into two moles of chlorine.

  • Every mole of sale has 35.45 grams of sales. 2.451 moles of seal are mine after that.
  • We are aware that cl is six times more than X. To find the moles of X, I must divide this number by six.
  • we discover that we have  0.4086 moles of X when we divide this by six.
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  • The element with this molar mass is sulfur, as I can see from the periodic table.
  • Okay, so the element we're looking for in this situation is sulfur.

To learn more about finding missing element visit;

brainly.com/question/14238796

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7 0
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