anonymous
  • anonymous
A bird flies 42 mph across a lake. If the lake is 3 miles across, find the time the bird took in a) seconds b) minutes and c) hours.
Physics
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anonymous
  • anonymous
A bird flies 42 mph across a lake. If the lake is 3 miles across, find the time the bird took in a) seconds b) minutes and c) hours.
Physics
schrodinger
  • schrodinger
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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ghazi
  • ghazi
time taken by the bird is \[t=\frac{ D }{ v } \]
ghazi
  • ghazi
convert 42 mph in mps for that you can use this relation 42 miles --- 1 hour ---60 minutes ---60*60 seconds 42 miles --- 3600 seconds in 3600 seconds -- 42 miles therefore in 1 second it will be \[\frac{ 42 }{ 3600 } miles= 0.011 miles\] therefore your mps is = 0.011 miles per second
ghazi
  • ghazi
now time t is \[t= \frac{ 3 }{ 0.011 }=272 s\]

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ghazi
  • ghazi
for minutes just divide 272 by 60 , because in each minute there are 60 seconds so 272/60= 4.533 minutes and in hours just divide 4.533 by 60 again so it will be 0.0755 hours , hope that helps you :D
anonymous
  • anonymous
yep it did! thanks alot!
ghazi
  • ghazi
:D YW

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