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What is calcium iodide?

Calcium iodide is a white, solid powder that is highly soluble in water. Calcium iodide slowly reacts with oxygen and carbon dioxide in the air, which releases the iodine ions and forms calcium carbonate. A yellowish change in color indicates a decomposition, as the yellow hue is caused by the separating iodine ions. Calcium iodide can also be formed through the interaction of calcium carbonate with hydroiodic acid.

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Why does my upper lip twitch?

Upper lip twitches occur in healthy people due to stress, fatigue, a heightened emotional state and excessive caffeine or alcohol consumption, Health Hype notes. A dietary deficiency, such as low potassium, can also be a cause.\nPersistent lip twitching, particularly if accompanied by other signs and symptoms, can signal a medical condition, according to Health Hype. For example, upper lip twitching may be one of the effects of Tourette's syndrome, which also includes nose wrinkling, tongue movement, unusual blinking and behavioral issues. Parkinson's patients often experience twitch..

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What is an experiment that includes dry ice?

After letting carbon dioxide gas accumulate in the container for about five minutes, bubbles are blown into it. The bubbles then sink as they cool. When a bubble touches a chunk of dry ice, it freezes. This happens because some of the air inside the bubble is replaced by carbon dioxide gas from the dry ice.\nThose planning on doing this activity should bear in mind that dry ice can cause frostbite, so gloves should always be used when handling it.

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What causes adhesion?

Adhesions develop during the recovery phase of an operation as scar tissue grows around the affected area. In places where two damaged structures are close together, inflammation triggers the growth of a protein called fibrin. Fibrin growth is a normal part of healing, but it can cause an adhesion to form where it takes up other proteins, such as collagen, and fails to dissolve.

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What is a monosynaptic reflex?

Another name that monosynaptic reflex goes by is the stretch reflex. Most monosynaptic reflexes can be found in the ankle, knee, spine, triceps biceps and jaw. The stretch reflex arc has been referred to as a negative feedback loop that exists to maintain healthy muscle lengths. In a neurological examination, a neurologist may use a reflex hammer to test these different points to help diagnose if a patient has an illness or condition. Using the reflex hammer on the calcaneal, or Achilles tendon, will cause a plantar flexion response from the sciatic nerve. Another method of testing the plantar..

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Do all protons have the same mass?

Protons, neutrons and electrons are subatomic particles that make up all atoms. Atoms are the building blocks of everything in the universe. The protons and neutrons make up the nucleus of the atom; protons and neutrons provide the bulk of an atom's weight, so the majority of the mass of an atom is in the nucleus, with the thin outer electron cloud providing comparatively little weight.In a different unit of mass, a proton is 1.007316 atomic mass units, while a neutron is 1.008701 atomic mass units. Because Einstein proved that mass and energy are the same (E = mc2), it is possible for sc..

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What is a high heat of vaporization?

The heat of evaporation is mainly dependent on the strength of intermolecular bonds. Substances with strong intermolecular bonds are more likely to have high heat of evaporation than those with weaker ones. When a substance reaches its boiling point, its temperature stagnates until all the substance is converted to a gas. All the heat energy exerted on the substance is used for breaking the intermolecular bonds. This is where the relationship between the heat of evaporation and intermolecular bond strength arises.

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How do we inherit traits from our parents?

DNA consists of 52 pairs of chromosomes, and each parent passes off one half of each pair to the child. When the two halves of the DNA then join together, the resulting combination determines what specific traits the child has.\nThe traits that are expressed in the child are determined by dominant and recessive genes. If one or both parents pass on a dominant gene to the child, this is the gene that is expressed. However, if both parents pass on recessive genes, then the recessive gene is expressed.\nThe most obvious example of this is eye color, where the gene for brown eyes is dominant and t..

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What is the largest cell?

Despite the large size of the egg, the ostrich egg is the smallest one laid in relation to the size of the bird. A female ostrich can be well over 6 feet tall and weigh 220 pounds. In some ostrich communities, the eggs of several females are laid in a communal nest. The father incubates them during the night, and the alpha female incubates them during the day.

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What is the Pandigital Supernova?

The Pandigital Supernova's laudable features include an SDMI slot, Bluetooth connectivity, and front and back cameras. However, its dim, low-quality 800x600 screen resolution is roundly criticized for its poor touch response. Critics also stated it felt cheaply made. It's not designed for beginning users because it comes with very little preinstalled beyond the basic operating system.\nThe Supernova does have one feature that made it attractive upon release: it is eminently hackable. Unlike most tablets, it's relatively easy to root the operating system on the Supernova and repl..

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