Physics, 04.12.2019 08:31 dreamdancekay
Agroup of students were testing different insulators. they used three metal cans, one wrapped with bubble wrap, a second with a paper towel, and third unwrapped. equal amounts of hot water were poured into each can and the temperature was noted at definite time intervals. the data is shown in the table.
from the data, they concluded that bubble wrap was the best insulating material. what is the weakness in the conclusion?
a) it is the better of two insulators only; it is not the best insulator.
b) the experiment should have been continued till the temperatures of the cans reached 0°c.
c) the experiment must be repeated at least three times before this conclusion can be drawn.
d) the data on the can without insulator is irrelevant and distracts from the main idea of the experiment.
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