The brightest, hottest, and most massive stars are the brilliant blue stars designated as spectral class O. If a class O star wi
th a mass of 3.38 ´ 1031 kg has a kinetic energy of 1.30 ´ 1042 J, what is its speed?
1 answer:
Answer:
2.77 * 10^5 m/s
Explanation:
Let us recall that kinetic energy is given by 1/2 mv^2
Where;
m = mass of the body
v = velocity of the body
In this case,
m = 3.38 * 10^31 kg
KE= 1.30 * 10^42 J
KE = 1/2 mv^2
v = √2KE/m
v = √2 * 1.30 * 10^42/3.38 * 10^31
v = √7.69 * 10^10
v = 2.77 * 10^5 m/s
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