1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
TEA [102]
3 years ago
5

Modern commercial airliners are largely made of aluminum, a light and strong metal. But the fact that aluminum is cheap enough t

hat airplanes can be made out of it is a bit of historical luck. Before the discovery of the Hall-Héroult process in , aluminum was as rare and expensive as gold. What would happen if airplanes had to be made of steel? The fuselage of the Boeing 747, which can carry passengers, is approximately a hollow aluminum cylinder without ends, long, wide, and thick (see sketch at right). The fuselage of an airplane Suppose this fuselage was made of steel (density ) instead of aluminum (density ), and let's say the average passenger has a mass of . We'll also assume the engines can't lift any greater mass than they already do. Calculate the number of passengers that the Boeing 747 could carry if its fuselage was made of steel.
Physics
1 answer:
iVinArrow [24]3 years ago
3 0

Answer:

 n = 291 people

Explanation:

To solve this interesting problem we are going to take some data from the tables, the density of 7075 aluminum is 2.8 103 kg / m³, the density of 316 stainless steel is 7980 kg / m³, where we have selected one of the most used alloys in for its resistance.

The average mass of a passenger is mo = 80kg and the Boeing 747 aircraft can carry 550 passengers and a crew of 18 people with a length of 70.66 m,

Let's start by calculating the mass of the empty plane and the mass of the passengers

         ρ_Al = m_Al / V

         m_Al = ρ_Al V

         m_passenger= #_pasajeros 80

         m_passenger = 550 m₀

         

The total mass of the plane is

          M = m_passengers + m_Al

If the plane is built face to face, the mass of this material is

        ρ_Acero = m_steel / V

         

the total mass of avino is

         M = m_pasajeros` + m_steel

As they indicate the total mass of the plane must remain constant

         m_passengers + m_Al = m_passengers` + m_steel

let's substitute the values

         550 m₀ + 2.8 103 V = n m₀ + 7.98 103 V

where V is the volume of the material used which is the same in both cases

         n = 550 mo + (2.8 - 7.98) 103 V = n mo

         n = n = 550 + (2.8 - 7.98) 103 V / mo

The calculation of the volume of material used depends on the thickness of the sheet and the resistance of the material, if it assumes that it has the same thickness, e = 1 cm, approximate the volume to the length of the circle by the length of the cylinder by the thickness

         V = (2π r) L e

  the diameter of the plane approximately the height of the person

         d = 1.8 m

         V = 2π (1.8 / 2) 70.66 1 10⁻²

         V = 3.9957 m³

  we substitute

          n = 550 - 5.18 10³ (3.9957) / 80

          n = 550 - 258.7

          n = 291 people

You might be interested in
K donates, or transfers, one electron to bromine, which has 7 electrons. Both K and Br are now stable with 8 electrons. K become
Charra [1.4K]

K is cation by losing of electron whereas Br is anion due to accepting of electrons.

<h3 /><h3>Is charge appears when an atom lose or accept electron?</h3>

Yes, the positive ion appears on K and become cation whereas the negative ion bears on Br which make it anion because of losing and gaining of electron by these atoms. This transferring of electrons leads to formation of ionic bonds between them.

So we can conclude that K is cation by losing of electron whereas Br is anion due to accepting of electrons.

Learn more about ionic bond here: brainly.com/question/2687188

#SPJ1

4 0
2 years ago
The product side of a chemical reaction is shown. → 7Ti2(SO4)3
Alex_Xolod [135]
The answer is the fourth choice because there are 7 represents in a coefficient.

7 0
3 years ago
Read 2 more answers
6. The average atomic mass of hydrogen is amu. 7. If a molecule is made of similar kind of atoms, then it is called atomic molec
Roman55 [17]
Answer/
I have no idea i’m so sorry

Explanation/
Have a good day
8 0
3 years ago
Calculate the minimum amount of work needed to move a 500-kg rocket payload from Earth's surface to the ISS in orbit 400,000m ab
WINSTONCH [101]

Answer:

2.000.000.000

Explanation:

Apply the formula:

Work = Force . Displacement

W = 500.10 . 400.000            (the 10 come from gravity)

W = 5000 . 400.000

W = 2.000.000.000 Joules

I think it is that, can be wrong.

7 0
3 years ago
A swimmer went 50.0 m in 26.55 seconds. What was her average velocity?
hichkok12 [17]

Answer:

GΔx = 50.0 m Δx =vt

t = 26.55 s 50.0 m = v (26.55 s)

v = ? v = 1.88 m/s

U

E

S/S

Explanation:

Hope this helps! Brainly if so!

8 0
3 years ago
Other questions:
  • Which represents a type of electromagnetic wave? A. slinky wave B. jump rope wave C. shortwave radio waves D. ocean wave
    9·2 answers
  • You exert of force of 75 newtons on a rock. You push and you push, but you can't budge it. You are exhausted! How much work did
    13·1 answer
  • What is the distance from the center of the Moon to the point between Earth and the Moon where the gravitational pulls of Earth
    6·1 answer
  • A copper cylinder is initially at 21.1 ∘C . At what temperature will its volume be 0.163 % larger than it is at 21.1 ∘C?
    9·1 answer
  • Which type of wave interaction is shown in the photo?
    11·2 answers
  • How does the period affects the centripetal force?
    15·2 answers
  • Which statement best defines the resistance of an electric circuit? (1 point) o It limits the amount of electrical energy that c
    8·1 answer
  • An offshore oil platform houses a drill for drilling oil. The drill descends from the platform and enters the ocean. At the bott
    5·2 answers
  • Greg’s mom baked 24 brownies for the bake sale. Vinnie’s mom
    11·2 answers
  • At the very end of 500 DAYS OF SUMMER, Tom (Joseph Gordon-Levitt) is so heartbroken by
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!