That there is evidence of electrical failure given that there was a gas leak. Enter your answer in accordance to the item b) of
the question statementEntry field with incorrect answer 0.55 (c) That there is evidence of a gas leak given that there is evidence of electrical failure.
2 answers:
Answer:
a) 0.84
b) 0.643
c) 0.931
Explanation:
Given:
The complete missing question is as follows.
" The maintenance firm has gathered the following information regarding the failure mechanism for 100 air conditioning systems:
Evidence of Gas Leaks
Yes No
Evidence of Electrical Failure Yes 54 4
No 30 12
Find:
a)The failure involves a gas leak
b)That there is evidence of electrical failure given that there was a gas leak.
c)That there is evidence of a gas leak given that there is evidence of electrical failure.
Solution:
"Refer to the attachment for the solution"
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Answer:
≅ 111 KN
Explanation:
Given that;
A medium-sized jet has a 3.8-mm-diameter i.e diameter (d) = 3.8
mass = 85,000 kg
drag co-efficient (C) = 0.37
(velocity (v)= 230 m/s
density (ρ) = 1.0 kg/m³
To calculate the thrust; we need to determine the relation of the drag force; which is given as:
=
× CρAv²
where;
ρ = density of air wind.
C = drag co-efficient
A = Area of the jet
v = velocity of the jet
From the question, we can deduce that the jet is in motion with a constant speed; as such: the net force acting on the jet in the air = 0
SO,
We can as well say:
We can now replace in the above equation.
Therefore, =
× CρAv²
The A which stands as the area of the jet is given by the formula:
We can now have a new equation after substituting our A into the previous equation as:
=
× Cρ
Substituting our data from above; we have:
=
×
=
= 110,990N
in N (newton) to KN (kilo-newton) will be:
=
= 110.990 KN
≅ 111 KN
In conclusion, the jet engine needed to provide 111 KN thrust in order to cruise at 230 m/s at an altitude where the air density is 1.0 kg/m³.