Alex drives his car 80 Km/h due east for 150 minutes to get to his school. How far did he travel in kilometer?
1 answer:
Answer:
200km
Explanation:
Use the formula Distance = speed × time ( transpose the speed formula )
Also remember to converted the minutes into hour because the answer asked for it in Km do this by dividing by 60
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![T = 5.45 h](https://tex.z-dn.net/?f=T%20%3D%205.45%20h)
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As we know that time period of one revolution around Mars is given as
![T = 2\pi\sqrt{\frac{r^3}{GM}}](https://tex.z-dn.net/?f=T%20%3D%202%5Cpi%5Csqrt%7B%5Cfrac%7Br%5E3%7D%7BGM%7D%7D)
here we know that
![r = 2.2 R](https://tex.z-dn.net/?f=r%20%3D%202.2%20R)
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![R = 3.396 \times 10^6 m](https://tex.z-dn.net/?f=R%20%3D%203.396%20%5Ctimes%2010%5E6%20m)
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![M = 6.42 \times 10^{23} kg](https://tex.z-dn.net/?f=M%20%3D%206.42%20%5Ctimes%2010%5E%7B23%7D%20kg)
now we have
![T = 2\pi \sqrt{\frac{(2.2\times 3.396 \times 10^6)^3}{(6.67 \times 10^{-11})(6.42\times 10^{23})}}](https://tex.z-dn.net/?f=T%20%3D%202%5Cpi%20%5Csqrt%7B%5Cfrac%7B%282.2%5Ctimes%203.396%20%5Ctimes%2010%5E6%29%5E3%7D%7B%286.67%20%5Ctimes%2010%5E%7B-11%7D%29%286.42%5Ctimes%2010%5E%7B23%7D%29%7D%7D)
![T = 19608 s](https://tex.z-dn.net/?f=T%20%3D%2019608%20s)
![T = 5.45 h](https://tex.z-dn.net/?f=T%20%3D%205.45%20h)