Work & Power Problems
1 answer:
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Answer:
Wien peak ( λmax ) is 107.40 nm
radius of super giant is 1.086 × m
Explanation:
given data
temperature 27 kK
power = 100000 times of Sun
Sun radius = 6.96 × 10^8 m
to find out
Wien peak ( λmax ) and radius of supergiant (r)
solution
we will apply here first wien law to find Wien peak that is
λmax = b / t
λmax = 2.9 × / 27000 = 1.0740 ×
so Wien peak ( λmax ) is 107.40 nm
and
now we apply steafay law that is
P = σ × A × .........................1
and we know total power output 100000 time of Sun
so we say
4πr²s = 100000 × 4πR²s
r² = 100000 × R² /
put here value
r² = 100000 × (6.96× )² ×
/
r² = 1.18132 ×
r = 1.086 × m
so radius of super giant is 1.086 × m
Answer:
Work done is zero
Explanation:
given data
Angle of kite with horizontal = 30 degree
tension in the string = 4.5 N
WE KNOW THAT
Work = force * distance
horizontal force =
DISTANCE = 0 as boy stands still. therefore
work done = 3.89 *0 = 0
Given :
Number of operations move through a pocket calculator during a full day's operation , .
To Find :
How many coulombs of charge moved through it .
Solution :
We know , charge in one electron is :
So , charge on n electron is :
Therefore , -21.44 coulombs of charge is moved through it .
Hence , this is the required solution .