Quiz 1 Physics 2 Section C
October 1, 2010
1)
M can run 3 miles in the time it takes J to run 2 miles and K to run 1
mile. M, J and K take part in a long distance relay where each person
runs 1 mile. They finish the race in 33 minutes. How long does J take
to run ONE mile?
Let time for M to run 3 miles be T
Then M takes T/3, J takes T/2 and K takes T to run a mile
T/3+T/2+T = 33 minutes
T=18 minutes
J takes 9 minutes to run one mile
2)
M has a partially filled container of water with some special chemical
called TLAS dissolved in it. She is about to measure the concentration
of this chemical when J pours distilled water that has no TLAS into
the container. (J and M hate each other if you must know.) Luckily M
sees that J has poured a full ONE‐liter bottle of distilled water into
the beaker. M measures the volume of liquid in the beaker to be 2.5L
after J does her deed. She measures the concentration of TLAS in this
2.5L to be 1.5%. What was the concentration of TLAS in the original
sample?
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 Fall '10
 ManojKaplinghat
 Physics, Salary, Imperial units, Mile, Pasteurization, fruit juice concentration

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