Biology, 14.07.2019 11:00 21schraderlily
Astudent is investigating the effect of different salts on melting points. four patches of ice of equal size are roped off and a different type of salt is poured on each, one receives table salt (nacl), one receives calcium chloride (cacl2), one receives potassium carbonate (kco3) and the fourth receives inert sand instead. each patch receives an equal amount of salt or sand. the student measures the volume of ice remaining and subtracts it from the original volume of ice to see how much melted away. what is a control variable in this experiment? a. the type of salt applied to the ice. b. the size of the ice patches. c. the amount of ice that melted. d. none of these.
Answers: 1
Biology, 21.06.2019 22:50
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Biology, 22.06.2019 12:40
Select the correct answer from each drop-down menu. the lac operon in e.coli regulates genes that code for enzymes required for breakdown of lactose. the lac operon is operon that is activated in the presence of .
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Astudent is investigating the effect of different salts on melting points. four patches of ice of eq...
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