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4 years ago

Which term best describes a nuclear chain reaction?. A)self-sustaining. B)weak. C)non-explosive

Chemistry

2 answers:

AURORKA [14]4 years ago

7 0

I took the Earth Science Nuclear Energy Quiz and the correct answer is self-sustaining.

I hope this helps you!

Allisa [31]4 years ago

6 0

Since we're talking about a chain reaction, I think this would be a) self-sustaining. Chain reactions are not usually described as "weak" and can be highly explosive depending upon the compounds (think Uranium!). The first (artificial) self-sustaining nuclear reaction is attributed to Enrico Fermi in 1942. Here's a bit of history: http://www.atomicarchive.com/History/firstpile/firstpile_01.shtml

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Given that a commercial airliner has a range a range of 9,500 miles using 265 tons of JP-4 fuel. Estimate the range of the aircr

Blizzard [7]

Here is the full question.

Given that a commercial airliner has a range of 9,500 miles using 265 tonnes of JP-4 fuel. Estimate the range of the aircraft burning either gaseous or liquid hydrogen at the same mass of hydrogen as JP4.

The dry mass of the aircraft is 800 tonnes. The fuel properties are as follows:

Fuel Density (kg/m³) Heating value (kJ/kg)

JP4 800.0 45000

H₂ (gaseous, S.T.P) 0.0824 120900

H₂ (liquid, 1 atm) 70.8 120900

Answer:

25,514 mi

Explanation:

Let first calculate the value of initial mass of the aircraft $m_1$ when burning JP4 fuel by using the expression:

$m_1 =m_2 + m_{JP4}$

where;

$m_2 = 800t$

$m_{JP4} = 265t$

$m_1 = 800t+265t$

$m_1=1065 t$

We need to employ the use of the range of the airliner which can be expressed by the formula;

$s = \eta__0}(\frac{L}{\delta g})In(\frac{m_1}{m_2})(\frac{Q_R}{g})$

where;

$\eta__0}$ = overall efficiency

L = lift

$\delta g$ = drag force

$m_1 =$ initial mass of the vehicle

$m_2$ = is the final mass of the airliner after the burning of fuel

$Q_R$ = is the heat of the reaction of the fuel burning.

g = gravitational acceleration

Rearranging the above equation; we have:

$\eta__0}(\frac{L}{\delta g}) = \frac{ s}{In(\frac{m_1}{m_2})({Q_R})}$

$\eta__0}(\frac{L}{\delta g}) = \frac{9500 mi}{In(\frac{1065t}{800t})({45000 kJ/kg})}$

$\eta__0}(\frac{L}{\delta g}) = \frac{0.2111}{In(1.33)}$

$\eta__0}(\frac{L}{\delta g}) = 0.74 mi.kg/kJ$

To estimate the range of the aircraft burning either gaseous or liquid hydrogen at the same mass of hydrogen as JP4; we have:

$s = \eta__0}(\frac{L}{\delta g})In(\frac{m_1}{m_2})(\frac{Q_R}{g})$

$s= (0.74mi.kg/kJ)(120900kJ/kg)In(\frac{1065t}{800t})$

$s= (89466mi)In(\frac{1065t}{800t})$

$s = (89466mi)In(1.33)$

s = 25,513.82 mi

s ≅ 25,514 mi

Thus, the range of the aircraft when burning either gaseous or liquid hydrogen at the same mass of hydrogen as JP4 is 25,514 mi

6 0

3 years ago

Please help I will mark as brainliest........

Gala2k [10]

Answer:

vegetables and salt

Explanation:

The ideal temperature for fermenting vegetables is between 18⁰-22⁰C. Within this range, the bacteria do their best work, giving high levels of lactic acid. The naturally occurring bacteria on fruits and vegetables is called lactobacillus. These bacteria convert the sugar to lactic acid, which is what gives that characteristic tangy/sour taste.

3 0

3 years ago

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What is an oxidizing agent?

abruzzese [7]

Answer:

An oxidizing agent (also called an oxidizer or oxidant) is referred to as a chemical compound that readily transfers oxygen atoms or a substance that gains electrons in a redox chemical reaction.

Explanation:

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3 years ago

A temperature of 50°F is equal to °C.

Tema [17]

50 degrees Fahrenheit is equal to about 10 degrees Celsius. Hope this helps!

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3 years ago

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What kinds of things could a magnet make another object or magnet do without touching it?

Sidana [21]

Answer:

Magnets can be used to make other magnets and things made of iron move without being touched. Something that has been electrically charged can make other things move without touching them.

Explanation:

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3 years ago