A few days ago
chemistry! please help.?
okay, i have the answer which my teacher gave me, but i don’t know how to get to it.
please help!
a penny has a diameter of 2.132 cm. how many pennies would you have to lay end to end to stretch 1.0 km
please explain the conversion!
Top 2 Answers
A few days ago
Favorite Answer
1 km = 1000 m
1 m = 100 cm
which means:
1 km = 100,000 cm
So, divide 100,000 cm (1km) by 2.132 cm (the diameter of a penny), which will give you the number of pennies (46,904) you would need to stretch 1km.
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A few days ago
you have to convert from cm to km. to do this:
2.132 cm X 10mm/1cm X 1 m/ 1000mm X 1 km/ 1000m =
all units will cancel out except the km.
answer: .000021 km or 2.1 X 10 ^ -5
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