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bulgar [2K]
3 years ago
11

Hazards that are associated with a structural fire include all of the following, EXCEPT: Select one: a. risk of building collaps

e. b. smoke and toxic gases. c. carbon dioxide deficiency. d. high ambient temperatures.
Chemistry
1 answer:
OlgaM077 [116]3 years ago
7 0

Answer:

c. carbon dioxide deficiency

Explanation:

Structural fire is occurring in residential or industrial buildings, which means indoors.

This is quite dangerous because all the smoke and toxic gases building up in these closed buildings. Temperature can rise up to extremely high values, especially if fire catches in industrial buildings where fuel or petrol is being used. Fire can also destroy carrying walls causing the building to collapse.

Some of the gases produced during fire are carbon monoxide and carbon dioxide which, found in high enough concentration, cause oxygen deficiency.

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A star is estimated to have a mass of 2.0 x 10 ^36kg. Assuming it to be a sphere of average radius of 7.0 x 10 ^5 km. Calculate
Montano1993 [528]

Answer:

<em>a)</em> <em>1.392 x 10^6 g/cm^3</em>

<em>b) 8.69 x 10^7 lb/ft^3</em>

<em></em>

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mass of the star m =  2.0 x 10^36 kg

radius of the star (assumed to be spherical) r = 7.0 x 10^5 km = 7.0 x 10^8 m

The density of substance ρ = mass/volume

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in g/cm^3 = (1.392 x 10^9)/1000 = <em>1.392 x 10^6 g/cm^3</em>

in lb/ft^3 =  (1.392 x 10^9)/16.018 = <em>8.69 x 10^7 lb/ft^3</em>

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