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faust18 [17]
3 years ago
5

Which of the following processes is not a physical change:drying wet clothes,cutting snowflakes out paper,lighting a match from

a matchbook?
Physics
1 answer:
gavmur [86]3 years ago
7 0
Cutting snowflakes out of a paper
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The speed limit on some interstate highways is roughly 80 km/h. What is this in meters per second? How many miles per hour is th
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Answer:

1) Speed in m/s equals 22.22 m/s.

2) Speed in miles per hour equals 49.712 mph.

Explanation:

Since we know that in 1 kilometer there are 1000 meters and in 1 hour there are 3600 seconds hence we can write

80km/h=\frac{80\times 1000m}{3600s}=22.22m/s

Now we know that 1 mile equals 1.609 kilometer  hence we conclude that 1 kilometer equals \frac{1}{1.609}=0.6214mile

Hence

80km/h=\frac{80\times 0.6214miles}{1h}=49.712mph

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