Q2 [45 marks] Consider Ibra region where the installed solar panels cost on average 2 OMR /W.
1 answer:
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Answer:
(a) 53.94%
(b) 26.61%
Explanation:
Change in area will be given by
where
represent change in area R is radius and subscripts O and n represent original and new respectively.
Substituting 10.55/2 for original radius and 7.16/2 for new radius then
(b)
Similarly, percentage elongation will be found by dividing the change in length by the the original length. In this case, rhe original length was 54.5mm and goes to 69 mm so the change in length is given by subtracting the final length from the original length
Percentage elongation is
Answer:
Source 2.
Explanation:
The efficiency of the ideal reversible heat engine is given by the Carnot's power cycle:
Where:
- Temperature of the cold reservoir, in K.
- Temperature of the hot reservoir, in K.
The thermal efficiencies are, respectively:
Source 1
Source 2
The power produced by each device is presented below:
Source 1
Source 2
The source 2 produces the largest amount of power.
Answer:
total time = 304.21 s
Explanation:
given data
y = 50% = 0.5
n = 1.1
t = 114 s
y = 1 - exp(-kt^n)
solution
first we get here k value by given equation
y = 1 - ...........1
put here value and we get
0.5 = 1 - e^{(-k(114)^{1.1})}
solve it we get
k = 0.003786 = 37.86 ×
so here
y = 1 -
1 - y =
take ln both side
ln(1-y) = -k ×
so
t = .............2
now we will put the value of y = 87% in equation with k and find out t
t =
total time = 304.21 s