Question

The brightest, hottest, an

Answer 1

The speed of the star is 255 km/s

Explanation:

The kinetic energy of a body is the energy possessed by the body due to its motion. Mathematically:

$KE=\frac{1}{2}mv^2$

where

m is the mass of the object

v is its speed

For the star in this problem, we have:

$m=3.38\cdot 10^{31} kg$ is the mass

$KE=1.10\cdot 10^{42} J$ is the kinetic energy

Therefore, the speed of the star is:

$v=\sqrt{\frac{2KE}{m}}=\sqrt{\frac{2(1.10\cdot 10^{42})}{3.38\cdot 10^{31}}}=2.55\cdot 10^5 m/s$

Which corresponds to 255 km/s

Learn more about kinetic energy:

brainly.com/question/6536722

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