When forming bonds in metal, metal releases its valence electron to produce positive ions.
Free radicals are electrons that exist in metallic bonds. It is simpler to alter the metal's shape because the electrons may easily flow between the atoms.
Whenever they establish bonds, metal atoms quickly surrender their valence electrons to produce positive ions.
Therefore free electrons found in metal alter the shape, due to the flow between the atoms.
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b. vein
c. lymph
d. artery
The right answer is vein (it contains blood and has valves).
The infra-cardiac veins of small and medium caliber possess this system of fight against gravity. The valves consist of a dense connective tissue, surmounted by endothelial cells, corresponding to a fold of the intima. They allow blood circulation in the sense organ / heart but prevent venous reflux.
Answer: b. vein
Vein is a blood vessel that exhibit thin muscular walls and it brings the deoxygenated blood from all the cells, tissues and organs back to the heart. In the veins the valves are present which prevent the backward flow of blood. Lumen of the vein is wide.
According to the above information vein is the correct option.
Answer:
The correct answer is - option D. rubbing hands in warm water.
Explanation:
The control group or the control is the variable or that is used in an experiment to check if the results are actually due to the experiment or to compare the result or effect of the experiment.
In this experiment, the independent variables are soap and the sanitizer and the dependent variable is the count of bacterial culture. To check the result or to compare the result that results are due to the experiment the control group is rubbing the hand vigorously in warm water.
B. Chemical energy to thermal energy
C. Nuclear energy to thermal energy
D. Potential energy to chemical energy
Answer:
The answer is B. Chemical energy to thermal energy Hopefully this helps!
Answer:
this is called Forced Speciation Explanation: