Answer:
A healthy artery is wider and has no blockages. The lumen (which is the hole in the centre of the artery), is open and clear. This means there is more blood flow. An artery of a person suffering from coronary heart disease is often blocked, usually by a fatty deposit. This means the blood does not flow as well. (See diagram, in which I would draw two arteries, one with a blockage of fatty deposit, one clear and healthy).
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Below are the choices that can be found elsewhere:
<span>semi-truck – it has more inertia
</span>
semi-truck – it has balanced forces
<span>
small car – it has more inertia
</span>
<span>small car – it has balanced forces
</span>
The answer is "<span>semi-truck – it has more inertia"</span>
Answer:
The Earth receives about 71% of the suns radiation. About 29% of that radiation is actually reflected back into space.
Explanation:
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<span>LD
means lethal dose. LD50 is the amount of a material, administered at once to
cause the death of half (50%) of a group of test organisms. A test which shows that LD50 of a certain
chemical is 20 mg per kg means that 20 milligrams of that chemical for every 1
kilogram body weight of the test animal when administered in one dose, causes
the death of 50% of the test group.</span>
