WEBVTT
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well, we lost your lander with respect to the
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earth is equal to We lost your lander with respect
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to space shitless the lot steals a spaceship with respect
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to the earth divided by one plus the lost you
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of lander. With respect to SpaceIy less sorry,
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it's multiplied by it's multiply by we lost of space
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. You've been respect to the Earth Divided by C
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Square. Let's plug into values. Um, 0.800
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times the speed of light less are 0.600 times the
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speed of light, divided by one less. Uh
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, Zito find hate little zero times the speed of
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light multiplied by 0.600 times the speed of light divided
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by C square. And therefore we lost your lander
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with respect to the earth is zero point 946 times
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the speed of light. Oh, this was a
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party. Now let's to part the well, we
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know it contracted land l A sickle to lp multiply
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by square Rudolph one minus B squared, divided by
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C Square. Let's plug in the values with proper
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length in this case is properly and is 0.200 light
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years into square root off one minus Zito find 600
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hold square. And therefore ah, contract id Land
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physical to 0.16 theater light years. Okay. No
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, it's two parts. See? Well, we
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know it d He is equal to how divided by
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we the time is distance divided by speed and speed
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. In this case is a speed off lander with
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respected e space shitless speed off space, You with
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respect to the earth and putting the values we have
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0.160 lying tears divided by aiding both lost easily him
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1.4 words in the times the speed of light.
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And this is equal to see the point 114 Uh
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, is there a 0.114 ah, years years.
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All right. And finally you need to do part
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D. Well, we know that kinetic energy,
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uh, kinetic energy is equal to gamma minus one
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times m c square and we have gone Our bitches
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one divided by square hood off one minus. We
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squared, divided by C squared minus one to M
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C square. No, let's plug in the values
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. We have one divided by square root off one
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minus zero point mine for six. We'll scare,
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um minus one multiplied by. Well, I am
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in this case is for multiply by 10 to the
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power five and speed off. Mind his three year
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old to buy me 10 to the power it holds
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square and therefore kinetic energy is equal to 7.5 run
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multiply by 10 to the power 22 chills.