Answers
Answer:
The number of passengers that the Embraer E170 could carry if its fuselage was made of steel is 39 passengers
Explanation:
The given parameters of the cylinder representing the fuselage are;
The length of the cylinder, l = 30.0 meters
The width of the cylinder, w = 2.5 meters
The thickness of the cylinder, t = 2.5 mm = 0.0025 meters
The volume of the metal required to make the fuselage cylinder, V = (π·w²/4 - π·(w - 2·t)²/4) × l
Therefore, by substituting the known values, we have;
V = (π × 2.5²/4 - π×(2.5 - 2×0.0025)²/4) × 30 = 0.58845957392
The volume of the metal required to make the fuselage cylinder, V≈ 0.58846m³
The given density of steel = 7.87 g/cm³ = 7870 kg/m³
The given density of aluminum = 2.70 g/cm³ = 2,700 kg/m³
Mass = Density × Volume
The mass of the fuselage made with steel = The given density of steel × The volume of the metal required to make the fuselage cylinder
∴ The mass of the fuselage made with steel = 7870 × 0.58846 ≈ 4631.18
The mass of the fuselage made with steel ≈ 4631.18 kg
Similarly, the mass of the fuselage made with aluminum = 2,700 × 0.58846 ≈ 1588.84
The mass of the fuselage made with aluminum ≈ 1588.84 kg
The total mass the Embraer E170 could carry = The mass of the fuselage made with aluminum + The mass of the 78 passengers
The average mass of each passenger = 79 kg
∴ The total mass the Embraer E170 could carry ≈ 1588.84 + 78 × 79 = 7750.84
The total mass the Embraer E170 could carry ≈ 7750.84 kg
The extra mass the Embraer E170 could carry when made of steel = (The total mass the Embraer E170 can carry) - (The mass of the fuselage made with steel)
∴ The extra mass the Embraer E170 could carry when made of steel = 7750.84 - 4631.18 = 3119.36
The extra mass the Embraer E170 could carry when made of steel ≈ 3119.36 kg
The number of passengers the Embraer E170 could carry when made of steel = (The extra mass the Embraer E170 could carry when made of steel)/(The average mass of one passenger)
∴ The number of passengers the Embraer E170 could carry if its fuselage was made of steel = 3119.36 kg/(79 kg/passenger) ≈ 39.489 passengers
The number of passengers that the Embraer E170 could carry if its fuselage was made of steel ≈ 39 passengers (we round down when counting people which are whole quantities)
Related Questions
A solution of baking soda has a pH of 9. Baking soda
(blank)
Answers
Answer: is a base
Explanation:
True or false for these!!!! Please help
Answers
True
True
False
True
False
Hope this helps!
Large areas on the leaves of some plants lack chlorophyll and are therefore not green in color. How does this most likely affect photosynthesis?
Not enough sunlight is captured in these areas of the leaves.
Carbon dioxide cannot enter these areas of the leaves.
Too much glucose builds up in these areas of the leaves.
Oxygen cannot be released in these areas of the leaves
Answers
Answer:
Not enough sunlight is captured in these areas of the leaves.
Explanation:
Photosynthesis is the process whereby green plants manufacture their food using carbon dioxide and water in the presence of sunlight.
The sunlight is the energy source which drives this chemical change or reaction.
Therefore, to capture the sunlight, the green pigment called chlorophyll is needed. Without this sunlight, photosynthesis will not take place. Photosynthesis is a light dependent reaction. Without light, the process is greatly hamperedEnergy stored in an object because of position or condition is called ___________ energy.
Answers
Answer:
Potential energy
A rocket travels 4500 meters in 150 seconds. What is its average speed?
Answers
Answer:
Your average speed was 3.77 Miles per hour
Explanation:
Mixtures can be separated by physical processes.
A sequence of physical processes can be used to separate common salt (sodium chloride)
from a mixture containing sand and common salt only.
Give the order and the correct scientific term for the physical processes used to separate the
common salt from the mixture.
Answers
don't know sorry.........
"Henry mixed salt and water together in a cup until he observed a clear solution. He measured the mass of the solution. Then he placed the cup outside for several sunny days during the summer. After a week, he observed that only solid salt remained in the cup and the mass had decreased. Henry concluded that a physical and chemical change occurred in this investigation."
Which statements correctly defend or dispute his conclusion?
A.)He is correct. Dissolving salt in water is a physical change, but evaporating the water is a chemical change. Formation of a solid is evidence that a chemical change occurred.
B.)He is correct. Evaporation is a physical change, but dissolving salt in water is a chemical change. The change in mass is evidence that a chemical change occurred.
C.)He is incorrect. Dissolving salt in water and evaporation of the water are both physical changes. The reappearance of salt is evidence that the change was reversible by a physical change, so it could not be a chemical change.
D.)He is incorrect. Dissolving salt in water and evaporation of the water are both chemical changes. The reappearance of salt is evidence that the change was reversible by a chemical change, so it could not be a physical change.
Answers
Answer:
C.)He is incorrect. Dissolving salt in water and evaporation of the water are both physical changes. The reappearance of salt is evidence that the change was reversible by a physical change, so it could not be a chemical change.
Explanation:
From the analogy of the problem presented, we can see that Henry is grossly incorrect. His conclusion from the process of the experiment he carried out is completely wrong.
Physical changes are changes that alters the physical properties of matter particularly the form and state.
Chemical changes leads to the formation of a new kind of matter.
We can see that since the salt was obtained back after evaporation, no change has occurred to it.
Therefore, evaporation in itself is a physical change process.
Answer:
c on ed
Explanation:
25.00 g of the compound is composed of 6.77 g of tin and 18.23 g of bromine. What is the percent by mass of tin in the compound? Show work.
Answers
The percent by mass of Tin : = 27.08%
Further explanationGiven
25.00 g of the compound
6.77 g of Tin
18.23 g of Bromine
Required
The percent by mass of Tin
Solution
Proust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison, so that compounds have a fixed composition of elements
%mass X = (mass X/mass sample) x 100%
So %mass of Tin :
= (6.77 g : 25 g) x 100%
= 27.08%
what is the molecular polarity of the following lewis structure
Answers
Please help me 30 pointsss dont guess please be sure
Answers
Answer:
Acid
Explanation:
;)
Which helps regulate the temperature range of the Earth's atmosphere? Water or Land
Answers
Answer:
The oceans atmosphere. AKA Water.
Explanation:
The oceans and the atmosphere are the two large reservoirs of water in the Earth's hydrologic cycle. The two systems are complexly linked to one another and are responsible for Earth's weather and climate. The oceans help to regulate temperature in the lower part of the atmosphere.
Earth's atmosphere get warm up by the temperature absorbed by the gases in the atmosphere. However it can balanced water in earth such as ocean currents and cooling.
What is ocean currents?Ocean currents are formed from the pressure difference in ocean level and thus in day time there will be winds from ocean to land which cools the earth's surface.
Surface of the earth warms up by absorption of heat energy from sun. This warming will be higher if there are more greenhouse gases such as carbon dioxide, methane oxides of nitrogen, Sulphur etc.
Greenhouse gases intensely absorbs the temperature from radiation and thus increase the temperature of earth's surface. These gases are mainly evolved to the atmosphere by industries and factories.
Other factor which affects the temperature of earth surface include wind, ocean level etc. The level of ocean and ocean currents helps to regulate the temperature of the surface and make it cool.
To find more about ocean currents, refer the link below:
https://brainly.com/question/20823678
#SPJ2
Water has a molar mass of 18.0 g/mol. How many particles of water do you drink if you drink 64 oz., or 1893 grams, of water in a day?
Answers
Answer:
[tex] \frac{1839}{18} = 102.16[/tex]
Take 102.16 and multiply by avogadros #
and you get 6.33 × 10^25 otherwise A
Answer:
Answer is A
Explanation:
I just took this.
Earths rocks change from one type to another over time die to various earth processes A- igneous rock B- cementation C- metamorphic rock D- rock cycle
Answers
Answer:
The rock cycle describes the processes through which the three main rock types (igneous metamorphic, and sedimentary) transform from one type into another.
6. A father rabbit had long ears while the mother rabbit had short ears. Which of these statements
explains why one of the baby bunnies could have long ears?
a
The baby bunny inherited its copies of the gene for ear length from its father and not from
its mother. Those genes connect together to make its ears long.
b
The baby bunny inherited its copies of the gene for ear length from its father and not from
its mother. Just like its father's genes, those genes instruct for proteins that connect in
ways that make its ears long.
С
The baby bunny inherited one copy of the gene for ear length from its father and one copy
from its mother. That gene combination instructs for proteins that connect in ways that
make long ears.
d
The baby bunny inherited one copy of the gene for ear length from its father and one copy
from its mother. Those genes connect together to make its long ears.
Answers
Answer:
D if I’m correct
Explanation:
I really am bad at chemistry
Answers
Answer:
A, 4,3,3,4
B, 3,2,2,3
C, 2,6,2,3
D, 1,2,1, 1
What do the letters ESM stand for?
Answers
Answer:
European stability mechanism
What characteristic of an element’s atoms always determines the element’s identity?
Answers
Answer:
Number of protons
Explanation:
There are three sub atomic particles. These are;
- Protons
- Electrons
- Neutrons
Among these three particles, only one determines the identity of the element. This is the Protons. The number of protons which is also called the atomic number determines the identity of an element. For instance, atom with one proton is Hydrogen and n other element can have atomic number of one.
What group on the periodic table is more reactive 5 or 6 and why?
Answers
Answer:
heheeheheh
Explanation:
Name the following parts:
A—-
B——
C——
Answers
B—-Neutron
C—-Proton
How many moles are present in 44.8 L of nitrogen gas (Na)?
Answers
Answer:
two moles
There are two moles.
Explanation:
what is the magnitude of earthquake took place in manila?
A.5.2
B.5.3
C.5.4
D.5.5
Answers
Answer:
i believe its 5.2
Explanation:
An atom is found in group 17 and contains 10 neutrons. How many valence
electrons does it have? *
Answers
The sun’s core is made of solid rock. True or false
Answers
Answer:
False
Explanation:
Heres what its made of:
The core is made of hot, dense plasma (ions and electrons), at a pressure estimated at 265 billion bar (3.84 trillion psi or 26.5 petapascals (PPa)) at the center. Due to fusion, the composition of the solar plasma drops from 68–70% hydrogen by mass at the outer core, to 34% hydrogen at the core/Sun center.
How many moles of H 2 will I need to make 5 moles of NH3?
12 SSO
Answers
Answer:
7.5 moles of hydrogen is required
Explanation:
Given data:
Number of moles of H₂ needed = ?
Number of moles of NH₃ = 5 mol
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Now we will compare the moles of ammonia and hydrogen.
NH₃ : H₂
2 : 3
5 : 3/2×5 = 7.5 mol
Thus, 7.5 moles of hydrogen is required.
Why are some energy resources more expensive to use than others?
Answers
There are 4 different types of sublevels: s,p,d,f true or false
Answers
I think it is true because level 4 has 4 sublevels which is s, p, d and f.
OMG PLS ANSWER IM USING SO MANY P OINTS I SWEAR I NEED
Answers
Answer:
1)They have different densities.
2) The molecules are packed differently
Explanation:
Oil and Water have different densities The first reason that water and oil don’t mix is because their molecules are packed differently. The molecules of water are packed very densely. (Would be good to show water molecules packed densely) In one glass of water, there are more molecules than the number of known stars in the universe!
Answer:
diff densities
Explanation:
can someone help answer this? thanks!
if surface tension relies on intermolecular forces, how could you make surface tension decrease?
(think about how and where molecules bind to each other)
Answers
Answer:
We could make the surface tension to decrease by removing and causing a disruption to the intermolecular forces(hydrogen bonds).
Explanation:
To explain this answer, we will consider an experiment whereby a paper clip is made to rest at the top surface of water inside a container/beaker.
First of all, the intermolecular forces present in water are also known as hydrogen bonds.
It's relationship with surface tension is that when there is high surface tension in the water, this high tension will allow the paper clip to rest on top of the hydrogen bonds present at the top surface in between the water molecules.
However, the surface tension will decrease when we remove or cause a disruption to the intermolecular forces (hydrogen bonds).
3. All the deer in Horry County represent which of the following?
species
biome
population
community
Answers
Answer:
community
Explanation:
Answer:
The correct answer is population. I took the test and got it right.
Determine the final temperature of sample with a specific heat of 1.1 J/g°C and a mass of 385 g if it starts out at a temperature of 19.5°C and 885 J of energy are added to it.
Answers
Answer:
T2 =21.52°C
Explanation:
Given data:
Specific heat capacity of sample = 1.1 J/g.°C
Mass of sample = 385 g
Initial temperature = 19.5°C
Heat absorbed = 885 J
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = Final temperature - initial temperature
885J = 385 g× 1.1 J/g.°C×(T2 - 19.5°C )
885 J = 423.5 J/°C× (T2 - 19.5°C )
885 J / 423.5 J/°C = (T2 - 19.5°C )
2.02°C = (T2 - 19.5°C )
T2 = 2.02°C + 19.5°C
T2 =21.52°C