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
Yanka [14]
3 years ago
6

Using equations, determine the temperature, pressure and density of the air for a aircraft flying at 19.5 km. Is this aircraft s

ubsonic or supersonic
Physics
1 answer:
Viefleur [7K]3 years ago
4 0

Answer:

a) - 72.5°c

b) pressure = 3625.13 Pa

c) density =  0.063 kg/m^3

d) it is a subsonic aircraft

Explanation:

a) Determine Temperature

Temperature at 19.5 km ( 19500 m )

T = -131 + ( 0.003 * altitude in meters )

  =  -131 + ( 0.003 * 19500 ) = - 72.5°c

b) Determine pressure and density at 19.5 km altitude

Given :

Po (atmospheric pressure at sea level )  = 101kpa

R ( gas constant of air ) = 0.287 KJ/Kgk

T = -72.5°c ≈ 200.5 k

pressure = 3625.13 Pa

hence density = 0.063 kg/m^3

attached below is the remaining part of the solution

C) determine if the aircraft is subsonic or super sonic

Velocity ( v ) = \sqrt{CRT}  =  \sqrt{1.4*287*200.5 } = 283.8 m/s

hence it is a subsonic aircraft

You might be interested in
How would you describe your appetite over the past couple of weeks? Have your eating habits altered in any way?
wolverine [178]

Answer:

no im in a rehab program so we eat the sam shi every day

Explanation:

brainlest?

5 0
3 years ago
Read 2 more answers
Jenny was applying her makeup when she drove into the student parking lot last Friday morning . Unaware that Cheryl was stopped
Akimi4 [234]

Answer: F = 102141N

Explanation: <em><u>Newton's 2nd Law</u></em> states that a force can change the motion of a body. The relation is given by

F = m.a

whose units are:

[F] = N

[m] = kg

[a] = m/s²

Jenny's car, at the moment of the break, had acceleration:

a=\frac{\Delta v}{\Delta t}

a=\frac{11}{0.14}

a = 78.57 m/s²

Then, Force is

F = 1300*78.57

F = 102141 N

<u>Jenny's car experienced a force of </u><u>magnitude 102141N.</u>

6 0
3 years ago
What is the pH of neutral substance?
Lunna [17]

Answer:

7

Explanation:

A substance that is neither acidic nor basic is neutral. The pH scale measures how acidic or basic a substance is. The pH scale ranges from 0 to 14. A pH of 7 is neutral.

8 0
4 years ago
When an experiment is replicated, how should the results of the two experiments compare?
Lelu [443]
The results of the experiments should be similar.
7 0
3 years ago
Read 2 more answers
_________ light is unique in that it vibrates mostly in one direction.
Misha Larkins [42]

Polarized light light is unique in that it vibrates mostly in one direction.

Polarized mild waves are light waves in which the vibrations occur in a single plane. The process of reworking unpolarized light into polarized light is called polarization. There are a ramification of methods of polarizing mild.

Polarization is used for differentiating among transverse and longitudinal waves. Infrared spectroscopy makes use of polarization. it is used in seismology to take a look at earthquakes. In Chemistry, the chirality of organic compounds is tested the use of polarization strategies.

Refraction is the change in route of waves that takes place when waves tour from one medium to every other. . Light has a dual nature. as it has waves, sunlight passing via  rainstorm makes a rainbow. however, while mild moves a sun mobile, it can provide strength as a series of very small bursts. particles of count number have names together with the proton, electron and neutron.

Learn more about lights here:-brainly.com/question/19697218

#SPJ4

6 0
2 years ago
Other questions:
  • In one type of mass spectrometer, ions having the same velocity move through a uniform magnetic field. The spectrometer is being
    6·1 answer
  • A small block of mass m on a horizontal frictionless surface is attached to a horizontal spring that has force constant k. The b
    7·1 answer
  • How can we calculate force
    12·2 answers
  • Please need help on this
    14·1 answer
  • On his fishing trip Justin rides in a boat 12 km south. The fish aren’t biting so they go 4 km west. They then follow a school o
    5·2 answers
  • If you throw a ball at 35° and 10 m/s what is the horizontal component of velocity
    10·1 answer
  • How should a scientist confirm that an experiment has good data
    14·2 answers
  • A round asteroid has a surface gravity of 0.0288
    9·1 answer
  • In music, the note G above middle C has a frequency of about 392 hertz. If the speed of sound in the air is 340 m/s, what is the
    8·1 answer
  • Spring 1 and Spring 2 are the same type of spring. Both springs were pushed or compressed into different positions and clamped i
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!