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saw5 [17]
3 years ago
7

In this diagram, medium A represents water and medium B represents air. The phenomenon in this diagram, moving from A to B, is c

alled
A) diffraction.
B) dispersion.
C) refraction.
D) resolution.
Physics
2 answers:
jarptica [38.1K]3 years ago
7 0

Answer: It is C for ppl on USATestprep.

Readme [11.4K]3 years ago
6 0
Its C) refraction
hope its may help you
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Using equations, determine the temperature, pressure and density of the air for a aircraft flying at 19.5 km. Is this aircraft s
Viefleur [7K]

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

4 0
3 years ago
Calculate net force <br> 532N 215N
lorasvet [3.4K]

Answer:

FN is the forces acting on a body. When the body is at rest, the net force formula is given by, FNet = Fa + Fg.

Im in 7th and thats all I know so I hope it's enough

8 0
3 years ago
Which of the following pieces of laboratory equipment is not directly used to make measurements
RoseWind [281]
I believe the answer is a test tube.
4 0
3 years ago
Read 2 more answers
20. Wile E. pushes a 76-kg boulder off of the 90-m cliff in an attempt to hit the Roadrunner. What will the kinetic energy of th
KIM [24]

Answer:

67,032 J

Explanation:

According to the law of conservation of energy, the kinetic energy of the boulder just before hitting the Roadrunner (at ground level) will be equal to the gravitational potential energy of the boulder at the top of the cliff, therefore:

K=U=mgh

where

m is the mass of the boulder

g is the acceleration of gravity

h is the height of the cliff

Here we have

m = 76 kg

g = 9.8 m/s^2

h = 90 m

Substituting,

U=(76)(9.8)(90)=67,032 J

6 0
3 years ago
Which of the following is the dimensional formula of the quantity which is expressed as force per unit area? *
MAVERICK [17]

Answer:

[MLT⁻²], the first option, is the answer.

Explanation:

Pressure is the unit expressed as force per unit area.

The dimensional formula of pressure is [MLT⁻²].

Thus the answer would be option 1!

5 0
2 years ago
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