Michelle melted a compound in the lab and performed the same procedure five times. the chart below shows the time it took for the compound to melt during the five trials.

trial time (min: sec)
1 3: 14
2 3: 10
3 4: 05
4 3: 12
5 3: 09

after reviewing her data, she realized that trial 3 was vastly different from the other four trial times. which of the following reasons could explain the radical difference in melting time for trial 3?

a larger quantity of compound was used in trial 3.
the compound started at a lower temperature in trial 3.
the burner was not directly under the compound during trial 3.
all of these

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

Utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must available hint(s)utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must pump water back into their cells to counter its loss due to osmosisactively pump water back out of their cells to counter its inflow due to osmosissynthesize membranes that are impermeable to substances that upset osmotic balanceactively pump salt back out of their cells to counter its inflow due to osmosis