Question

the brightest , hottest, and most massive stars are the brilliant blue stars designated as spectral class O. if a class O star with a mass of 3.26x10^31 kg has a kinetic energy of 1.10x10^42 j, what is its speed?

Answer 1

The speed is 0.956 m / s.

Explanation:

The kinetic energy is equal to the product of half of an object's mass, and the square of the velocity.

                   K.E = 1/2 $\times$ m $\times$ $v^{2}$

where K.E represents the kinetic energy,

           m represents the mass,

            v represents the velocity.

                  K.E = 1/2 $\times$ m $\times$ $v^{2}$

    1.10 $\times$ 10^42 = 1/2 $\times$ 3.26 $\times$ 10^31 $\times$ $v^{2}$

                     $v^{2}$ = (1.10 $\times$ 10^42 $\times$ 2) / (3.26 $\times$ 10^31)

                     v = 0.956 m / s.