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4 years ago

Which phrases describe an irregular galaxy?

1 answer:

4 0

An irregular galaxy is the one which does not have any shape. It means it does not fit into the categories described by the Hubble. Such types of galaxies contain large amount of dust and gases. These are a site of stellar formation and hence contain young stars and are very bright. these galaxies are usually smaller than other types of galaxies. for example: Large Magellanic Clouds and Small Magellanic Cloud. Therefore, the phrases that describe an irregular galaxy are:

1. contains many young stars

2. contains a lot of gas and dust

3. is smaller than other types of galaxies

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atroni [7]

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3 years ago

The minimum fresh air requirement of a residential building is specified to be 0.35 air changes per hour (ASHRAE, Standard 62, 1

ra1l [238]

Answer:

3150 L/min

Explanation:

The volume of the room is the product of the height of the room and its area. It is given as:

Volume (V) = height (h) × Area (A)

V = h × A

Height = 2.7 m, Area = 200 m². Hence:

V = h × A = 2.7 × 200 = 540 m³

The flow capacity ( $\dot {V}$ ) is given by

$\dot {V}=ACH*Volume\ of\ room$

ACH = air changes per hour = 0.35

$\dot {V}=ACH*Volume\ of\ room\\\\\dot {V}=0.35*540\\\\\dot {V}=189\ m^3/h$

But 1 m³ = 1000 L, 1 hr = 60 min

$\dot{V}=189\ m^3/h=\frac{189\ m^3*\frac{1000\ L}{1\ m^3} }{1\ h*\frac{60\ min}{1\ h} } =3150\ L/min\\\\\dot{V}=3150 \ L/min$

6 0

4 years ago

HELP FAST WILL MARK BRAINLIEST (for a real answer)

Nata [24]

Answer:

B. 180 million joules

Explanation:

Apply the formula for heat transfer given as;

Q=m*c*Δt where

Q = electrical energy consumed by the heater in joules

m= mass of air in the chamber in kg

c= specific heat of air in joules per kg degrees Celsius

Δt= change in temperatures in degrees Celsius

Given in the question;

m= 1200 kg

c= 1000 J/°C /kg

Δt = 180°-30°= 150° C

Substitute values in the equation to get Q as;

Q=m*c*Δt

Q= 1200 * 1000* 150

Q= 180000000 joules

Q = 180 million joules

<u>The correct answer option is B : 180 million joules.</u>

7 0

3 years ago

An analog baseband audio signal with a bandwidth of 4kHz is transmitted through a transmission channel with additive white noise

siniylev [52]

Answer:

2k20

Explanation:

4k ✈

8 0

3 years ago

A 1m3 tank containing air at 25℃ and 500kPa is connected through a valve to

Aliun [14]

Answer:

The right answer is "2.2099 m³".

Explanation:

Given:

Mass,

m = 5 kg

Temperature,

T = 35℃

or,

= 35 + 273

Pressure,

P = 200 kPa

Gas constant,

R = 0.2870 kj/kgK

By using the ideal gas equation,

The volume will be:

⇒ $PV=mRT$

or,

⇒ $V=\frac{mRT}{P}$

By substituting the values, we get

$=\frac{5(0.2870)(35+273)}{200}$

$=\frac{441.98}{200}$

$=2.2099 \ m^3$

8 0

3 years ago