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What is the bulk density of sand?

Bulk density is a property of all particulate matter. It is calculated by dividing the mass of a substance by its volume. A material's bulk density may change depending on its handling. Powder in a cylinder has a different bulk density if the cylinder is disturbed. This is because the particles move, then settle more closely together, resulting in a different volume. Soil's bulk density varies according to its degree of compaction and its mineral makeup.

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How is amber formed?

Contrary to popular belief, amber is not fossilized sap. It is resin, which is a semisolid amorphous organic substance. It has a structure based on linked isoprene C5H8 units. Plants secrete resin in their pockets and canals through their epithelial cells.\nWhen insects and fungi feed on a tree, it secretes resin as a defense mechanism to trap the predatory life forms. Resin also has healing properties that treat wounded limbs.\nNatural forest conditions cause the volatile terpenoid fractions in resins to evaporate. If the non-volatile terpenoid fractions are strong enough to withstand degrada..

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What happens to the current in a short circuit?

A short circuit happens when part of a wire carrying electricity touches another part of the circuit or other conductive material, thus giving electricity a pathway that offers less resistance than the circuit is designed to handle. For example, if a wire becomes exposed and touches the metal frame of a device, current can flow along the outside causing the potential for injury and death if someone touches the charged device. A short circuit, as suggested by the name, provides electricity with a shorter path to ground or to equalize electrical potential across two terminals. Less distance mean..

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How are genes related to DNA?

DNA is a long molecule that, in all organisms except for viruses and some bacteria, takes the form of a double helix. This structure resembles a twisted ladder that has numerous rungs. One of four chemicals, namely adenine, thymine, guanine and cytosine, forms each side of each individual rung. The order of these four chemicals works as an alphabet, allowing organisms to create very long, complicated codes. The entire DNA strand is billions of base pairs, or rungs, long. Fortunately, organisms do not need to read and interpret the entire DNA strand each time they need to build some more protei..

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How was the proton discovered?

The Purdue University College of Science notes that after the discovery of radioactivity, Rutherford began to study the alpha particles emitted by uranium metal and its compounds. Rutherford discovered that a narrow beam of alpha particles broadened as it passed through a thin film of mica or metal. When the foil was bombarded with alpha particles, Geiger, who was Rutherford’s assistant, found that there was a tiny scattering on the order of one degree.\nThe results of the study were the same as Rutherford’s expectations. He was able to confirm that the alpha particle had a significant mas..

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Is a substance that releases hydrogen ions in water called a base?

The pH scale is a measure of acidity and runs from 0 to 14. A solution with:\n\nAlmost identical numbers of hydrogen and hydroxide ions is neither acidic nor basic, has a pH of 7 and is considered neutral.\nMore hydrogen than hydroxide ions has a pH less than 7 and is acidic.\nMore hydroxide than hydrogen ions has a pH greater than 7 and is basic.\n \nWhen an acid is added to a basic solution, the hydrogen and hydroxide ions react to form water, and the pH of the solution changes.

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What are the products of transcription called?

Transcription occurs when RNA polymerase connects to a strand of DNA. The RNA polymerase forms a strand of RNA by joining nucleotides into a chain, using DNA as the template.\nThree types of RNA are produced. Messenger RNA is the template used to create proteins. Ribosomal RNA uses the messenger RNA to determine the order of amino acids for the protein being created. Transfer RNA carries loose amino acids to be bonded to the end of the protein chain.

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Which planet has sulfuric acid clouds?

Venus has a thick and extremely toxic atmosphere that is hot enough to melt lead. It's about 67 million miles from the sun, and a year on Venus is equal to 225 days on Earth. Below Venus's sulfuric acid clouds, the planet is covered in mountains and live volcanoes.Venus spins in the opposite direction of the other planets in the solar system and is one of the brightest objects in the sky. It can be seen with the naked eye and is found near the sun.

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What is responsible for making ATP?

Photosynthesis is the process by which photons are filtered through chloroplasts in plant cells. This process creates ATP and electron carriers, which are then converted into carbohydrates such as glucose.\nGlycolysis occurs either when a plant consumes its stored glucose or when the plant is consumed by another organism. Two ATP are created as a result of the breakdown of glucose into two pyruvate subunits. During cellular respiration, pyruvate is then combined with oxygen, creating carbon dioxide, water and 16 ATP per unit of pyruvate.\nFermentation converts pyruvate into ATP, carbon dioxide..

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What is the metric unit for density?

Density shows how compact atoms, molecules and ions are in a substance. The density of solids is highest when liquids have lower densities. Gases have the lowest density, as the atoms and molecules in a gas are not tightly bound together.\nDensity of a substance depends on temperature and pressure. At lower temperatures, molecular and atomic motion slows down, causing them to become more compact. This causes substances to have higher densities at lower temperatures. The only anomaly is water, which has its highest density at 4 degrees Celsius. So the density of water in the solid state is actu..

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