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Can stomach acid dissolve metal?

Hydrochloric acid forms in the stomach when hydrogen and chloride combine. Hydrochloric acid's low pH of about two means that it can dissolve metal, so the stomach needs protection from the harsh acid. The stomach is coated with mucus, enabling food to be broken down by the acid without damaging the stomach lining. When the body works properly, it produces just the right amount of this gastric acid that it needs for digestion.

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What is the classification for Paramecium caudatum?

Paramecium caudatum is a one-celled organism that is visible with the help of a microscope, as stated by 101Science.com. This microorganism is shaped like a slipper and possesses two nuclei. Like other paramecium species, it is found in stagnant water and feeds on bacteria, algae and yeasts. It beats the multitude of tiny cilia on its membrane in order to move through the water. Paramecium caudatum is a model organism for genetics research.

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What are the parts of the circulatory system?

The primary organ of the circulatory system is the heart. It is a four-chambered muscular pump that forces blood to flow within an enclosed circuit of blood vessels, as stated by the University of Minnesota. These tubular structures are classified into three types: veins, arteries and capillaries. Veins transport deoxygenated blood, arteries carry oxygenated blood and capillaries are the conduits for nutrient absorption and gas exchange.Oxygen-starved blood enters the heart through the right atrium. The blood then flows down into the right ventricle where it is pumped into the lungs to obtain ..

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What is the law of conservation of momentum?

Conservation of momentum is derived from Newton's laws of motion. Newton's third law states that every action has an equal but opposite reaction; the force that one object A exerts on object B is equal but opposite to the force that object B exerts on object A. By Newton's second law, this force is equal to the product of the mass and the acceleration of the objects, so the product of the mass and acceleration of object A is equal but opposite to the product between the mass and acceleration of object B.\nAcceleration is the change of velocity divided by the time. Time is cancel..

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What are the differences between protists and bacteria?

Protists are also single-celled organism, but they do have a nucleus and other intracellular organelles. Examples of protists are amoeba and paramecium.Some similarities between these two organisms are that they both can be uni-cellular organisms, which can either stay in one position or move through structures like flagella. Another similarity is that members of each kingdom can either be autotrophs or heterotrophs. Autotrophs can make their food, while heterotrophs cannot do this.

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What is the Earth's mantle made of?

The Earth's mantle also contains aluminum, calcium, iron, potassium and sodium. Some of the rocks created include garnets and pyroxenes. In addition, olivine and spinel are formed. The two most readily available elemental bonds that can be found are Si02 and MgO.\nThe Earth's mantle has four layers: the lithosphere, asthenosphere, upper mantle and lower mantle. The lithosphere is the outermost level of the upper mantle. This layer's name often includes reference to the Earth's crust, though the lithosphere has different features like temperature.\nThe next layer, the asthen..

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Why doesn't alcohol freeze?

It appears that alcohol does not freeze when put into a regular icebox, but this is because the conditions are not cold enough. Pure alcohol, or ethanol, freezes at the extremely low temperature of -174.6 degrees Fahrenheit, according to North Carolina State University. Water, on the other hand, freezes at 32 degrees Fahrenheit.A substance reaches its freezing point when the force of attraction between its molecules becomes powerful enough to overcome the kinetic energy of the molecules when the substance is in a liquid state. Freezing occurs when the molecules become fixed in an array to form..

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Why do people no longer hear sonic booms?

Sonic booms are easy to hear, but cannot be observed by the naked eye. As with other types of sound waves, sonic booms are generally only seen in photographs taken with sophisticated cameras. Sonic booms vary in duration and intensity. Generally, the largest and fastest objects produce the largest sonic booms after breaking the sound barrier.

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What lessons can you teach with a 3-D human body model?

Build-a-Body is one website that provides students with a 3D model of the human body. The website has several interactive elements on which students can focus by zooming in from system to system. In addition to describing the function and connective elements of each system, the website provides students with helpful resources that focus on some diseases that affect individual body parts and systems.\nThe Bio Digital Human website is another resource that provides visitors with anatomy lessons and options. You can look at every aspect of the human body in 3D while also hiding or removing functi..

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What is the compound H3PO4?

Phosphoric acid is an ingredient in household cleaners and rust inhibitors. It is used as a dental etching solution and removes plaque from teeth before whitening. In construction, it is used to eliminate hard water stains and mineral deposits. Phosphoric acid is an ingredient in several foods and soft drinks, especially colas, adding acidification and a sour or tangy taste.\nExposure to concentrated forms of phosphoric acid is corrosive to the skin and eyes, and ingesting it causes burns and tissue destruction within the gastrointestinal tract. Inhalation can lead to pulmonary edema or chemic..

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