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What are the isotopes of lithium?

Li-7 is also used to make Be-7, another radioisotope. It's also much more abundant than Li-6. The binding energies of both isotopes is so low that they are very nearly unstable. Both Li-6 and Li-7 are produced in stars, and Li-7 was one of the first elements created after the Big Bang.\nRadioisotopes of lithium include Li-8, Li-9 and Li-11. These radioisotopes have half-lives of only a few seconds. The other four radioisotopes of lithium are extremely short-lived.\n"Regular" lithium is a soft, silvery-white, flammable alkali metal. Because it is such a reactive substance, it is never foun..

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What is the difference between involuntary and voluntary muscles?

Involuntary and voluntary muscles also appear differently when viewed under a microscope. Involuntary muscle, called smooth muscle, is located within blood vessels, digestive system and internal organs, with the exception of the heart. It looks smooth when viewed under a microscope and doesn't have the striations or stripes that are seen in voluntary muscle tissue.\nVoluntary muscles are also called skeletal muscles. These are the muscles attached to the bones, and movement is caused through contraction of these muscles. Every movement a body makes is due to voluntary muscles contracting ..

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How does a capacitor work?

Capacitors can store static charge once the voltage difference used to induce the charge is removed. They are similar to batteries in their charge-storage capabilities, the difference being that batteries store charge in the form of chemical energy, which is slowly released as the electrical energy driving current through the circuit. Capacitors release their energy much more quickly: in seconds or milliseconds.\nCamera flash is an example of the rapid energy release capabilities of capacitors. A capacitor attached to the flashgun charges up from the battery. Once the capacitor is charged, it ..

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What is the function of motor neurons?

The acetylcholine binds to the receptors on the fiber of the muscle, causing an action potential to be propagated along the fiber of the muscle in both directions. The contraction of the muscle is then triggered by this action potential. If both ends of the muscle are rigid, the contraction leads to an increase in the force on the supports, and this is referred to as the isometric contraction. If the ends of the muscle are not fixed and the muscle is shortened without any resistance, the contraction causes a constant force known as the isotonic contraction. The motor neurons responsible for th..

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What does "gravity" mean?

All planets have gravity, but some have more than others. After the sun, Jupiter has the strongest force of gravity in the solar system because it has the largest mass of all the planets. Gravity keeps people and things grounded on the surface of the Earth instead of floating through the air.\nThe word's origin comes from the Latin stem word "gravitas," which means heaviness. Another use of the word "gravity" means seriousness, as in the sentence, "He tried to explain the gravity of the situation to those who thought the prank was funny."

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What is a gravimetric analysis of a metal carbonate?

The carbonate ions that bond with the calcium are donated from the unknown metal carbonate, hence, the moles of calcium carbonate must equal the moles of the unknown metal carbonate. From this relationship, the relationship between the atomic masses of the elements can be determined and thus the atomic mass of the unknown metal element.\nGravitational analysis is advantageous because it allows for an absolute and direct method of measurement, which uses inexpensive apparatus with a high degree of accuracy and precision. Also, possible sources of errors are easily checked since all products are..

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How do you practice reading a micrometer?

Become familiar with the instrumentLearn the micrometer's basic parts and respective functions, such as the body, anvil and spindle.Spin the ratchetSpin the ratchet with the object inside the micrometer's anvil and spindle until they are both touching the object.Read the measurement markersFormulate the measurement utilizing the whole number, as well as the 1/100,000, 1/25,000, and 1/10,000 markings.

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How many blocks are in a square meter?

For example, 1 decimeter is ten times smaller than 1 meter. It takes one hundred blocks with an area of 1 square decimeter each to fill 1 square meter. Although 1 meter is just ten times larger than 1 decimeter in linear units, the area is squared, and so the order of magnitude doubles.

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What muscles attach to the coracoid process?

The coracobrachialis is a small muscle that is found just beneath the biceps and at the top of the coracoid process. It allows for the movement of the arm, especially the elbow. Because this muscle is used so often, it is subject to injury and overuse.\nThe body has two pectoral muscles, which are found in the chest. The pectoralis minor is the smaller of the two. It is a flat muscle that is found right under the larger of the pectoral muscles. It branches up from the third, fourth and fifth ribs to attach to the coracoid process. It allows the scapula to tilt upward and rotate downward.\nThe ..

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What is an exoskeleton?

Insects are an example of animals that have an exoskeleton. They do not have internal bones, and their muscles are attached to the exoskeleton. When a muscle contracts, it pulls on the exoskeleton and causes the insect to move. Most insects lose their exoskeleton in a phase called molting. During this phase, insects are very vulnerable to predators because the new exoskeletons have not hardened enough to protect them.

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