Physics, 02.10.2020 15:01 joshuasanders8862
A student poured 200 mL of water and 4.0 g of sugar into two separate cups and started a stopwatch. The student stirred the contents of one cup but did not stir the other. He measured the time for the sugar to dissolve completely in each cup.
Which choice best describes the purpose of this experiment?
A. To determine the effect of the amount of sugar on the time for it to dissolve in water
B. To determine the effect of temperature on the time for sugar to dissolve in water
C. To determine the effect of the volume of water on the time for sugar to dissolve in water
D.
To determine the effect of stirring on the time for sugar to dissolve in water.
Answers: 3
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Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.
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A student poured 200 mL of water and 4.0 g of sugar into two separate cups and started a stopwatch....
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