Question

A)How much energy is required to accelerate a spaceship with a rest mass of 131 metric...

A)How much energy is required to accelerate a spaceship with a rest mass of 131 metric tons to a speed of 0.594 c?

B)Every day our Earth receives 1.55×1022 J energy from the Sun. If we were able to use 0.95 percent of this energy to accelerate spaceships, then how many missions would be possible in one year?

Homework Answers

Answer #1

A

K = γ* m0*c2 - m0*c2 = m0*c2 (  γ -1)

γ = 1/sqrt( 1-v2/c2 )

= 1/sqrt( 1-0.594^2) =1.2430621

K = 131*10^3*(3*10^8)^2*(1.2430621 -1)

K = 2.865*1021 J

B)

Every day our Earth receives 1.55×1022

useful energy in one day =0.95/100 * 1.55*10^22 J

in one year = 0.95/100 * 1.55*10^22 *365 J =5.374625e22 J

number of mission we can send by this energy

= total energy received / energy required in one mission

= 5.374625e22 / ( 2.8657021*10^21)

=18.7550025 ship

= 19 ship answerr

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