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
Which property of metals allows corrosion to take place? reactivity malleability ductility conductivity Description
horrorfan [7]
Your best bet would be reactivity
7 0
3 years ago
Read 2 more answers
A pendulum is swinging next to a wall. The distance from the bob of the pendulum to the wall varies in a periodic way that can b
nexus9112 [7]

The formula of the trigonometric function that models the distance HHH from the pendulum's bob to the wall after t seconds is

H(t) = 15 -6sin(2.5π(t -0.5))

Detailed explanation:

The function can be expressed as the following for the midline M, amplitude A, period T, and time t0 at which the function deviates from the midline:

 H(t) = M -Asin(2π/T(t -t0))

The equation is based on the parameters M=15, A=6, T=0.8, and t0 = 0.5.

H(t) is equal to 15 -6sin(2.5π(t -0.5))

<h3>What is function?</h3>

The trigonometric functions in mathematics are real functions that connect the right-angled triangle's angle to the ratios of its two side lengths .In all areas of study that involve geometry, such as geodesy, solid mechanics, celestial mechanics, and many others, they are widely used.

To learn more about functions visit:

brainly.com/question/15607563

#SPJ4

The correct question is:

A pendulum is swinging next to a wall. The distance from the bob of the swinging pendulum to the wall varies in a periodic way that can be modeled by a trigonometric function.

The function has period 0.80.80, point, 8 seconds, amplitude 6 \text{ cm}6 cm6, start text, space, c, m, end text, and midline H = 15 \text{ cm}H=15 cmH, equals, 15, start text, space, c, m, end text. At time t = 0.5t=0.5t, equals, 0, point, 5 seconds, the bob is at its midline, moving towards the wall.

Find the formula of the trigonometric function that models the distance HHH from the pendulum's bob to the wall after t seconds. Define the function using radians.

5 0
1 year ago
Which is belief held by sociologists who work from a social-conflict perspective
Ksju [112]
Some social patterns are helpful, while others are harmful.
7 0
3 years ago
Read 2 more answers
The windowpanes are___________ a. opaque b. transparent c. absorbent .
kogti [31]

Answer:

The windowpanes are- transparent.

The color of the panes are due to the wavelengths of light that the glass- allows to pass through

Explanation:

Just answered the question.

4 0
3 years ago
Read 2 more answers
Which are ways to improve the design of this experiment? Check all that apply.
forsale [732]
-Reduce the sample size so the experiment can be done faster.-Increase the sample size from 6 cups to 12 cups of sand and water.-Use more legible handwriting when recording data.-Use more precise digital thermometers.<span>-Use more precise scales that measure to the hundredth of a gram.</span>
6 0
3 years ago
Read 2 more answers
Other questions:
  • What should be the spring constant k of a spring designed to bring a 1200 kg car to rest from a speed of 85 km/h so that the occ
    12·1 answer
  • What does the equation
    7·1 answer
  • Often in Physics we will show a frame of reference as a
    15·1 answer
  • A 2.2 kg object is whirled in a vertical circle whose radius is 1.0 m. If the time of one revolution is 0.97 s,
    7·1 answer
  • ¿A que velocidad viaja la luz?
    5·2 answers
  • ASAP pls answer right and I will mark brainiest
    12·1 answer
  • What is a core sample?
    8·1 answer
  • Write the working mechanism of Mercury Barometer and explain its parts in short.​
    6·1 answer
  • When two surfaces interact, some mechanical energy leaves the system as thermal energy due to ________.
    8·1 answer
  • how fast would a(n) 73 kgkg man need to run in order to have the same kinetic energy as an 8.0 gg bullet fired at 430 m/sm/s ?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!