Jackie is the fastest student. (Option A)
Explanation:
- From the table it was understood that their speeds are given in meter per second, that is how many meters they run in one second. It was again shown that Jackie's race speed is 5.3 meter per second and all the other three namely Jeremy's speed is 3.9 meter per second, Mike's speed is 4.1 meter per second and finally Niki's speed is 3.8 meter per second.
- So, by comparing with others Jackie is the fastest runner in that race.
Explanation:
It is given that, the Average Speed of the orbiting space shuttle is 17500 miles/hour.
We need to convert the speed in kilometers/
second
We know that,
1 mile = 1.609 km
or
1 km = 0.621 miles
1 hour = 3600 seconds
![17500\ \dfrac{\text{miles}}{\text{hour}}=17500\ \dfrac{\text{miles}}{\text{h}}\times \dfrac{1\ h}{3600\ s}\\\\=17500\times \dfrac{\text{miles}}{3600\ s}](https://tex.z-dn.net/?f=17500%5C%20%5Cdfrac%7B%5Ctext%7Bmiles%7D%7D%7B%5Ctext%7Bhour%7D%7D%3D17500%5C%20%5Cdfrac%7B%5Ctext%7Bmiles%7D%7D%7B%5Ctext%7Bh%7D%7D%5Ctimes%20%5Cdfrac%7B1%5C%20h%7D%7B3600%5C%20s%7D%5C%5C%5C%5C%3D17500%5Ctimes%20%5Cdfrac%7B%5Ctext%7Bmiles%7D%7D%7B3600%5C%20s%7D)
Now cancel the miles in numerator.
![17500\times \dfrac{\text{miles}}{3600\ s}=17500\times \dfrac{\text{miles}}{3600\ s}\times \dfrac{1.609\ km}{1\ \text{miles}}\\\\=17500\times \dfrac{1.609}{3600}\ km/s\\\\=7.82\ km/s](https://tex.z-dn.net/?f=17500%5Ctimes%20%5Cdfrac%7B%5Ctext%7Bmiles%7D%7D%7B3600%5C%20s%7D%3D17500%5Ctimes%20%5Cdfrac%7B%5Ctext%7Bmiles%7D%7D%7B3600%5C%20s%7D%5Ctimes%20%5Cdfrac%7B1.609%5C%20km%7D%7B1%5C%20%5Ctext%7Bmiles%7D%7D%5C%5C%5C%5C%3D17500%5Ctimes%20%5Cdfrac%7B1.609%7D%7B3600%7D%5C%20km%2Fs%5C%5C%5C%5C%3D7.82%5C%20km%2Fs)
So, 17500 miles/hour is equal to 7.82 km/s.
The original results have not been replicated consistently and reliably.
I just wanna know what does that even mean