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Physics 13 Online
OpenStudy (anonymous):

what is the relation of these: 1. the amout of postage placed on a first-class letter depends on the weight of the letter 2. the temperature of a cup of coffee depends on how long it has been cooling 3.the height which a football attains depends upon the number of seconds it was kicked. help

OpenStudy (anonymous):

They are directly proportional.

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