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]
2 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]2 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
4. Which scientist proposed the theory that the Moon formed from fission? (5 points)
NeTakaya
The answer would be B, George Darwin :)
7 0
3 years ago
a box with a weight of 555 N is sitting on the ground and the bottom of the box measures 0.55 m by 0.45. What is the pressure ex
IrinaK [193]

Explanation:

Pressure = force / area

P = 55 N / (0.55 m × 0.45 m)

P = 220 Pa

8 0
3 years ago
the brightness of stars as they appear from earth is measured by _______ magnitude. a. light b. apparent c. relative d. absolute
xxTIMURxx [149]
How bright a star appears from Earth is the star's apparent magnitude.
8 0
2 years ago
Just these 2 question. I have no idea what it's asking..​
Murljashka [212]

Answer: did you get the answers?

Explanation:

5 0
2 years ago
A child with a mass of 20 kg sits at a distance of 2 m from the pivot point of a seesaw. where should a 16-kg child sit to balan
Maksim231197 [3]
In the above problem, we need to find mass of the second child, so that the Center of Mass remains at the origin( pivot).

CM= m1r1+m2r2/m1+m2
0= 20*-2+16*r2/20+16
r2= 40/16
r2= +2.5 m

4 0
2 years ago
Other questions:
  • Which of the following is not a simple machine?
    9·2 answers
  • A volleyball is hit and experiences a net
    15·1 answer
  • Nitrogen has a melting point of -210.0°C and a boiling point of -195.8°C. A sample of nitrogen is heated from -215.0°C to -200.0
    6·1 answer
  • In a uranium fission reaction, uranium splits into two smaller atoms and energy. Where did the energy come from?
    11·2 answers
  • Two horizontal forces act on a 1.4 kg chopping block that can slide over a friction-less kitchen counter, which lies in an xy pl
    13·1 answer
  • The current in a coil with a self inductance of 1.5 mH increases from 0 to 1.0 A in a tenth of a second. What is the induced emf
    8·1 answer
  • A hammer has a mass of 1 kg. What is its weight (i) on Earth (ii) on the
    15·1 answer
  • Assume that g is 10 N/kg and that air resistance and other
    14·1 answer
  • Which type of relationship is formed when a megabat eats a fig and drops the
    9·1 answer
  • What happens to the atomic number of an atom when the number of neutrons in the nucleus of that atom increases? a It decreases b
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!