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
Sergio039 [100]
3 years ago
13

An airplane wing is designed so that the speed of the air across the top of the wing is 255 m/s when the speed of the air below

the wing is 199 m/s. The density of the air is 1.29 kg/m3. What is the lifting force on a wing of area 27.0 m2?
Physics
1 answer:
grin007 [14]3 years ago
6 0
<h2>Answer:442758.96N</h2>

Explanation:

This problem is solved using Bernoulli's equation.

Let P be the pressure at a point.

Let p be the density fluid at a point.

Let v be the velocity of fluid at a point.

Bernoulli's equation states that P+\frac{1}{2}pv^{2}+pgh=constant for all points.

Lets apply the equation of a point just above the wing and to point just below the wing.

Let p_{up} be the pressure of a point just above the wing.

Let p_{do} be the pressure of a point just below the wing.

Since the aeroplane wing is flat,the heights of both the points are same.

\frac{1}{2}(1.29)(255)^{2}+p_{up}= \frac{1}{2}(1.29)(199)^{2}+p_{do}

So,p_{up}-p_{do}=\frac{1}{2}\times 1.29\times (25424)=16398.48Pa

Force is given by the product of pressure difference and area.

Given that area is 27ms^{2}.

So,lifting force is 16398.48\times 27=442758.96N

You might be interested in
One drawback of dams is that they can flood land upstream from the dam and reduce water flow downstream from the dam. Question 2
vivado [14]

Answer:

True

Explanation:

It can cause flooding and destruction of habitat because of dammed rivers create large reservoirs upstream which can spill out to the surrounding during heavy rainfall causing flooding and destruction of natural habitat.

7 0
3 years ago
I need help on this question
raketka [301]

Answer:

there are 5 hydrogen atoms in that formula

3 0
3 years ago
Read 2 more answers
A bungee jumper hangs from a bungee cord with zero velocity. If the bungee
Oksana_A [137]

Answer:

the answer is 14.2 m

Explanation:

8 0
3 years ago
How does solar energy produce electricity?
elena-14-01-66 [18.8K]
By the use of "Solar cells" or "Solar panel", we can trap solar energy in silicon/germanium rods, then we can convert in into electricity too.

Hope this helps!
8 0
2 years ago
Suppose astronomers built a 20-meter telescope. How much greater would its light-collecting area be than that of the 10-meter Ke
nirvana33 [79]

Answer:

4 times greater

Explanation:

<u>Step 1:</u> Calculate light-collecting area of a  20-meter telescope (A₁) by using area of a circle.

Area of circle = π*r² =\frac{\pi d^{2}}{4}

Where d is the diameter of the circle = 20-m

A_{1} = \frac{\pi d^{2}}{4}

A_{1} = \frac{\pi (20^{2})}{4}

A₁ = 314.2 m²

<u>Step 2:</u> Calculate light-collecting area of a  10-meter Keck telescope (A₂)

A_{2} = \frac{\pi d^{2}}{4}

Where d is the diameter of the circle = 10-m

A_{2} = \frac{\pi (10^{2})}{4}

A₂ = 78.55 m²

<u>Step 3</u>: divide A₁ by A₂  

= \frac{314.2 m^2}{78.55 m^2}

= 4

Therefor,  the 20-meter telescope light-collecting area would be 4 times greater than that of the 10-meter Keck telescope.

5 0
3 years ago
Other questions:
  • Where does the engery of an earthquake originate
    13·1 answer
  • Please I really need help on these
    15·1 answer
  • PlzHELP
    11·1 answer
  • A student studies how an objects mass and speed are related to its kinetic energy. The table shows the results for one part of t
    15·1 answer
  • What is the term for the overall change in position?
    6·2 answers
  • What is the relationship between the applied force of a hanging mass on a spring and the spring force of the spring?
    15·1 answer
  • UCaShoTLLOuuj9D4vqFtTpSQ<br><br> search
    14·1 answer
  • On a distance-time graph, which is your independent and dependent variable?
    7·2 answers
  • When does the air parcel stop losing energy?
    10·2 answers
  • 2. A ladder 16cm long weighs 420N and it's centre of gravity is 7m from one end.It is carried horizontally by two boys,each hold
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!