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zimovet [89]
1 year ago
14

If a train travels 500 kilometers from Stockholm to

Physics
1 answer:
o-na [289]1 year ago
4 0

Hello,

Average speed is total distance divided by total time. From the problem, our total distance is given as 500 kilometers and given time is 5 hours. Therefore, the average speed is:

\displaystyle{v_\text{average}=\sum_{i=1}^n \dfrac{s_i}{t_i}}\\\\\displaystyle{v=\dfrac{500\ \text{km}}{5 \ \text{h}}}\\\\\displaystyle{v=100 \ \text{km/h}}

Therefore, the average speed is 100 km/h. Please let me know if you have any questions!

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Answer:

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Explanation:

We know that efficiency is the ratio of output power by input power. i.e. Efficiency describes the quality of machine or system how good it is.

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Efficiency = 80% = \frac{80}{100}  = 0.8

Now,

According to definition,

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Hope this helps...

Good luck on your assignment...

4 0
3 years ago
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