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3 years ago

What kind of questions do scientists ask?

Chemistry

1 answer:

Usimov [2.4K]3 years ago

7 0

ones that are answered through observing :)

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Prokaryotic cells and Eukaryotic cells both contain all 4 biomolecules. True or False

Allisa [31]

The answer is false thank u

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3 years ago

Label the particles, charges, & mass for Elements: 6, 8 & 10?

pashok25 [27]

Answer:

charges, & mass

Explanation:

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2 years ago

Acidified water is electrolysed by using carbon electrodes. What is produced

kotegsom [21]

Answer:

Hydrogen gas

Explanation:

During electrolysis of acidified water, H+ ions are reduced to H2 gas at the negative carbon electrode (cathode) and hence hydrogen gas is liberated at cathode.

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3 years ago

A corpse discovered in the desert at 5:00 PM was found to have larvae from the blow fly species Phormia regina that had just dev

horrorfan [7]

Answer:

12.19 hours prior to discovery was the corpse placed in the desert.

Explanation:

Heat required for fly eggs to develop into first instar larvae = $Exposure\,time\times temperature$

From the given,

Exposure time = 16 hrs

Temperature = 27 C

$=16\times 27 = 427.2^{o}C$

The day time exposed hours is 10 hrs.-(7.00am-5.00pm)

$=10\times 37.8 = 378^{o}C$

So, the extra heat = 427.2-378= 49.2

The addition heat divided by average temperature.

Average temperature = 22.4 C

$=\frac{49.2}{22.4}= 2.19 hrs$

So, the total time exposed is night time hours to day time hours.

= 10+2.19 = 12.19 hrs.

Therefore, 12.19 hours prior to discovery was the corpse placed in the desert.

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3 years ago

What were the four elements that ancient Greeks believed to exist

ruslelena [56]

Answer:

The ancient Greeks believed in the four elements of air, earth, fire, and water. The Greek philosopher Empedocles is known for originating the theory of these classic four elements being the basis of all things.

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3 years ago