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3 years ago

14

Air is a.... O Solid O Liquid O Gas O Plasma

1 answer:

Galina-37 [17]3 years ago

6 0

Answer:

Air is a gas

Explanation:

i think. beavuse it cant be a liqued or a solid. i dont think a plasma. i would answer gas

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Relationship between civil engineering and geology

natka813 [3]

Answer:

Geological and civil engineers sometimes work together, but have very different responsibilities. While geological engineers study the earth's inner and outer surface to evaluate potential mining and infrastructure construction sites, civil engineers design the infrastructure to be built.

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3 years ago

An engine operates on gasoline (LHV=44 MJ/kg) with a brake thermal efficiency of 37.9 % What is the brake specific fuel consumpt

scZoUnD [109]

Answer:

$s =0.21\ kg/Kw.hr$

Explanation:

Given that

Calorific value (CV) = 44 MJ/Kg

CV= 44,000 KJ/kg

Brake thermal efficiency(η) = 37.9 %

We know that

$\eta =\dfrac{BP}{\dot{m_f}\times CV}$

Where BP is the brake power

$\eta =\dfrac{BP}{\dot{m_f}\times CV}$

$0.379 =\dfrac{BP}{\dot{m_f}\times 44000}$

$\dfrac{BP}{\dot{m_f}}=16676$

Brake specific fuel consumption (s)

$s =\dfrac{\dot{m_f}}{BP}$

$s =\dfrac{3600\times \dot{m_f}}{BP}$

$s =\dfrac{3600}{16,676}\ kg/Kw.hr$

$s =0.21\ kg/Kw.hr$

7 0

3 years ago

Could a volcanic eruption suddenly bury a city and its inhabitants? (Plz explain to me)

andrezito [222]

Yes a volcanic eruption can suddenly bury a city ! if you look up some stuff on pompeii you can learn more

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3 years ago

Calculate the density of a hydraulic oil in units of kg/m^3 knowing that the density is 1.74 slugs/ft^3. Then, calculate the spe

Amanda [17]

Answer:

Density of oil will be 897.292 kg $m^3$

And specific gravity of oil will be 0.897

Explanation:

We have given density of oil is 1.74 slugs/ $ft^3$

We have to convert this slugs/ $ft^3$ into kg/ $m^3$

We know that 1 slugs = 14.5939 kg

So 1.74 slug = 1.74×14.5939 = 25.3933 kg

And 1 cubic feet = 0.0283 cubic meter

So $1.74slug/ft^3=\frac{1.74\times 14.5939kg}{0.0283m^3}=897.292kg/m^3$

Now we have to calculate specific gravity it is the ratio of density of oil and density of water

We know that density of water = 1000 kg/ $m^3$

So specific gravity of water $=\frac{897.292}{1000}=0.897$

7 0

4 years ago

Question 11 (1 point)

kirill115 [55]

Answer:

False

Explanation:

Bella counts products in finished goods inventory and she counts kits in various stages of manufacturing.

4 0

3 years ago