The energy from our sun is produced by _____.
2 answers:
Answer: D. fusion of hydrogen
Explanation:
Nuclear fusion is a process which involves the conversion of two small nuclei to form a heavy nuclei along with release of energy.
Nuclear fission is a process which involves the conversion of a heavier nuclei into two or more small and stable nuclei along with the release of energy.
The reactions which takes place in sun follows a series of equations:
Overall reaction for the above series of reactions is given by:
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Answer:
a) N = 8.54[rev]; b) v = 21.73 [m/s]; c) T = 4.918[s]; d) 12.2[rev/min]
Explanation:
We know that the arc length is calculated by the following expression:
L = α * r
where:
r = radius = 17 [cm] or 0.17 [m]
α = 360° or 2*pi [rad] = 6.283 [rad]
L = (6.283*0.17) = 1.068 [m] = 106.81 [cm] is the distance travelled in one revolution of the CD
a) N = number of revolutions
N = 913 / 106.81
N = 8.54 [rev]
b ) The speed can be calculated by the following expression:
v = d/t
Where:
d = distance = 913[cm]
t = time = 42[sec]
v = 913/42 = 21.73 [cm/s]
c)
We have the number of revolutions and the time therefore we can calculate the number of revolutions per second
w = 8.54 / 42 =0.2033 [rev/s]
And we know that the period is the reciprocal of the time
T = 1 / 0.2033
T = 4.918 [s]
d )
We need to convert from [rev/s] into [rev/min]