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2 years ago

Infrared telescopes are usually placed on high-flying airplanes or on satellites in space __________

Physics

1 answer:

Yuliya22 [10]2 years ago

3 0

Answer:

In order to improve visibility

Explanation:

Infrared telescopes are made using infrared cameras that contain infrared detectors which are solid-state and are maintained at very cold (cryogenic) temperatures

Infrared radiation is absorbed by water vapor which is present in the Earth's atmosphere, leading to the limitation of the use of infra red telescopes at high altitudes such as mountains, high flying planes or satellites

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Water is flowing in a pipe with a varying cross-sectional area, and at all points the water completely fills the pipe. At point

RideAnS [48]

Answer:

a) 2.33 m/s

b) 5.21 m/s

c) 882 m³

Explanation:

Using the concept of continuity equation

for flow through pipes

$A_{1}\times V_{1} = A_{2}\times V_{2}$

Where,

A = Area of cross-section

V = Velocity of fluid at the particular cross-section

given:

$A_{1} = 0.070 m^{2}$

$V_{1} = 3.50 m/s$

a) $A_{2} = 0.105 m^{2}$

substituting the values in the continuity equation, we get

$0.070\times 3.50 = 0.105\times V_{2}$

$V_{2} = \frac{0.070\times 3.5}{0.150}m/s$

$V_{2} = 2.33m/s$

b) $A_{2} = 0.047 m^{2}$

substituting the values in the continuity equation, we get

$0.070\times 3.50 = 0.047\times V_{2}$

$V_{2} = \frac{0.070\times 3.5}{0.047}m/s$

$V_{2} = 5.21m/s$

c) we have,

Discharge $Q = Area (A)\times Velocity(V)$

thus from the given value, we get

$Q = 0.070m^{2}\times 3.5m/s\$

$Q = 0.245 m^{3}/s$

Also,

Discharge $Q = \frac{volume}{time}$

given time = 1 hour = 1 ×3600 seconds

substituting the value of discharge and time in the above equation, we get

$0.245m^{3}/s = \frac{volume}{3600s}$

$0.245m^{3}/s\times 3600 = Volume$

volume of flow = $882 m^{3}$

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3 years ago

What transformation is happening l? Radio playing a song

sladkih [1.3K]

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2 years ago

Biotic parts of an ecosystem interact with

natta225 [31]

Biotic parts of an ecosystem interact with living things like plants, animals, bacteria, and more organisms. Abiotic parts of an ecosystem are non-living things

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3 years ago

Explain the origin of earth's motion based on the origin of the galaxy and its solar system?

slava [35]

There are numerous theories as to the origin of our galaxy and our solar system within our galaxy. I have attached two references that will detail several of them.

As far as motion of the earth, our planet has a prograde revolution around the sun. Prograde motion would be a counterclockwise motion. All the planets in our solar system have this prograde revolution. They all accomplish this revolution in the same plane. Most all the planets have a prograde roatation, like earth, as they perform this revolution.

One of the theories about how the universe and the galaxies and solar systems were formed after the Big Bang is a theory called the "nebular theory." A nebula is a gas and dust cloud. According to this theory, the gas and dust particles collided with each other, were gravitationally attracted to each other, and got progressively larger. As this formation happened, a centripetal force was created by the force of the collisions and the mass of planets began to spin and revolve. It should be noted there is room for the revolutions and rotations to go one way or another, depending on the angle of incidence in the collision of said gas and dust particles. This would be one accounting for the present motion of the planetary constituents in our solar system.

5 0

2 years ago

The density of un-set concrete is 2.40 x 10 3 kg/m 3 . When a block with volume 0.0708 m 3 is

Dima020 [189]

Answer:

1665 N

Explanation:

The weight of an object is the gravitational force that pulls the object towards the Earth's centre. Its magnitude is given by

$W=mg$