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Lunna [17]
2 years ago
7

What are the three main functions of the cardiovascular system?.

Biology
1 answer:
Leviafan [203]2 years ago
4 0

The cardiovascular system has three main functions:

transport of oxygen, carbon dioxide and nutrients.

clotting of open wounds.

regulation of body temperature.

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If the efficiency of a gasoline engine is 25%, what happens to the missing 75% of the energy in the fuel?
hram777 [196]

The 75% energy which does not do any useful work gets dissipated as thermal energy in gasoline engines.

Explanation:

The efficiency of any engine like gasoline engine is the ratio of work done in contrast to heat or energy provided.

Gasoline engines are internal combustion engine. The thermal efficiency is calculated of these engines.

work done or efficiency= \frac{work done}{heat absorbed}

         or heat absorbed is divided by heat used in doing work

the friction and in other forms heat gets lost.

In gasoline engine about 65 to 75 % heat gets emitted without any useful work done. The heat gets lost in friction, air turbulence, noise and work input to turn on the engine. After the dissipation of heat in it only 25% is used up by vehicle having gasoline engines.

5 0
3 years ago
Describe the connection between glycerol, fatty acids and triglycerides.
Leya [2.2K]
<h2>Answer:</h2>

<h3>In a fat molecule, the fatty acids are attached to each of the three carbons of the glycerol molecule with an ester bond through the oxygen atom. During the ester bond formation, three molecules are released. Since fats consist of three fatty acids and a glycerol, they are also called triacylglycerols or triglycerides.</h3>
6 0
3 years ago
12)Scientists study the biosphere to examine the relationship between biotic and abiotic factors that impact the entire planet a
andrew11 [14]

Answer:D

Explanation:

This isn’t B, because it’s only one species. It isn’t C, because it is one population, and A doesn’t make sense due to how they are of course organisms. D is your best bet.

7 0
3 years ago
What is the difference between carbon-13 and carbon-14?
puteri [66]

Answer:

10000000000000000000847y7ubbvjbhughu ehtiggogj hghghg ee plus ate jvjvvjbvvjdd

3 0
2 years ago
PLEASE HELP!! 50 POINTS!!
NeX [460]
Gene flow is the phenomenon of transfer of gene from one species/population to others. According to Natural Selection, more suitable (which fits best with the environment) gene/allele make the characteristic of that individual. So, it increases the ability to survive and reproduction

Hope this helps!
8 0
3 years ago
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