Astudent drops a piece of paper and records the time for the paper to hit the floor. the student then folds the paper in
half and repeats the process. the student does this four more times, each time, folding the paper in half. the student
always drops the paper from the same height.
the independent variable is the:
a. the temperature of the room
b. the time to hit the floor
c. dimensions of the paper
d. the height of the drop

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In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. nitric acid is added, and the reaction proceeds to give a hydrated tin(iv)oxide plus no2and h2o. the hydrated tin(iv)oxide is then heated strongly and reacts as follows: sno2.xh2o(s)sno2(s)+ xh2o(g)the sno2is finally cooled and weighed in the crucible. explain the effect on the calculated atomic weight of tin that would result from each of the following experimental errors: (a)considerable spattering occurs when the nitric acid is added to the tin.(b)the hydrated tin(iv)oxide is not heated sufficiently to change it completely to tin oxide.