Directions: select each correct answer. more than one answer may be correct.
rodrigo is using the design process to make a device that will cool a drink without ice or electricity. his first prototype was simply an airtight, watertight pouch containing 40 g of ammonium chloride (nh4cl). he added 100 ml of water to the ammonium chloride, sealed the pouch tightly, and then wrapped the pouch around a small bottle of water. he tested his prototype by measuring the temperature of the bottle of water over time.

next, rodrigo performed the same test with different amounts and different concentrations of the ammonium chloride solution. for each set of measurements, he found the lowest temperature reached by the bottle of water and calculated the total temperature change. the table below summarizes his results.

maximum cooling achieved

trial 1 2 3 4 5 6 7

grams of nh4cl 30 40 50 50 60 70 80

amount (ml) of
water added 100 100 100 150 150 200 200

greatest
temperature
change (–°c) 3.6 4.3 4.3 4.8 5.2 5.6 5.8


finally, rodrigo held the amount and concentration of the solution constant while trying different amounts of insulation.

maximum cooling achieved

trial 8 9 10 11

insulation used: none towel blanket polystyrene-foam

greatest
temperature
change (–°c) 5.8 8.8 9.3 9.6


rodrigo wants to find more ways to improve his latest design. which of the following should he try?
(choose all that apply)

a - a more concentrated solution
b - a less concentrated solution
c - better insulation
d - less insulation
e - a greater amount of solution
f - a lesser amount of solution

Better insulator.

A greater amount of solution

Explanation:

a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves