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What is a children's description of the meaning for "E=MC"?

Matter can be thought of as highly organized energy, and energy can be viewed as disorganized matter. Turning one into the other can only be done at a certain ratio, and that ratio is what Einstein's equation provides. Splitting a heavy atom makes two lighter atoms, but their combined weight is not equal to the weight of the original atom; it's slightly lower. The difference in mass was converted to energy at a rate of E(energy released) = m(difference in mass) x c(the speed of light)2.

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What is the fossil record?

Rather than being a formal set of specific evidence, the fossil record simply refers to the collective evidence that exists in physical and research form that proves the existence of evolution. When fossils of specific animals are assembled in chronological order, they prove the development of a species over time. For example, scallop fossils show the way this animal has gradually developed over thousands of years.

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What is the formula for rubidium nitrate?

Rubidium nitrate contains one atom of rubidium, represented by the symbol Rb; one atom of nitrogen, represented by the symbol N; and three atoms of oxygen, represented by the symbol O3. Rubidium nitrate can be formed through a reaction of rubidium and nitric acid or a reaction of rubidium hydroxide with nitric acid. It is used in the preparation of fireworks to produce a reddish, violet hue.

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What is the function of a pinocytotic vesicle?

Nonspecific absorption by the cell can be accomplished in different ways, depending on the substance being absorbed, as explained by Wikipedia. One way of taking in fluids is pinocytosis, or "cell drinking," as it is sometimes called. In this process, the surface of a cell invaginates to form a pocket. Extracellular fluid is then drawn into that pocket as it closes to form a pouch. This pouch then pinches shut at its apex and detaches from the rest of the cell's plasma membrane, whereupon it is conveyed into the cytoplasm of the cell as a pinocytotic vesicle.\nOnce adrift in the cell, the..

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How do machines work?

Machines range in sophistication from simple to incredibly complex. Inclined planes, wedges, levers and screws are examples of basic machines. They consist of one piece, and allow the user to transmit or enhance an applied force in a useful way. In the case of a screw, the twisting force applied to the screw allows the user to drive one solid substance into another. An inclined plane, on the other hand, transmits the kinetic energy used to roll an object uphill into potential energy.\nCombustion engines use the power of a controlled chemical explosion to move certain mechanical parts in prescr..

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What months in North America are considered fall?

The autumnal equinox is one of the two equinoxes every year, the other being in March. This is when the sun shines directly on the equator, making the length of day and night almost equal to one another all over the world. The word equinox is a Latin word that means “equal night.” During the fall equinox, many cultures have different celebrations. In ancient Greece, the time of the September equinox is the time to perform different rituals for security and protection.

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What is an example of a pivot joint?

Pivot joints belong to the classification of joints called synovial joints. These joints are characterized by a synovial cavity filled with fluid between the articulating bones. Freely movable, the surfaces of the bones' connecting areas are covered with articular cartilage, which reduces friction. The bones comprising a synovial joint also rely upon ligaments to help hold them together. The synovial membrane, which lines the interior of the synovial cavity connecting the articulating bones, secretes a lubricant called synovial fluid.In addition to pivot joints, the synovial joints includ..

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What is the formula for silver nitrite?

When combined together, one atom of nitrogen and two atoms of oxygen bond together to create nitrite, which has a charge of -1. The -1 charge of the nitrite balances the +1 charge of the silver ion, which means the total compound has a neutral charge. The formula for silver nitrate is written as AgNO3 because the nitrate combines one atom of nitrogen with three atoms of oxygen.

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What muscles are antagonistic pairs?

The forearm is controlled by the biceps and triceps contractions. The BBC explains that the forearm moves downs when the triceps contract, and it moves up when the biceps contract. The movements succeed when the muscles get shorter.\nAnother example of an antagonistic muscle pair is the quadriceps and hamstrings. The BBC says that these muscles are responsible for extending and contracting the knee. The quadriceps contract to pull the lower leg forward, and the hamstrings contract to pull the lower leg backwards. The motion allows the leg to swing back and forth. The pair allows the arm to lif..

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What are the rod shaped structures in the nucleus of a cell?

The word "chromosome" is derived from the Greek words "chroma," meaning "color," and "soma," meaning "body." Chromosomes condense into thicker structures and align on metaphase plates while mitosis occurs.\n\nHumans normally have 23 chromosome pairs. Chromosomes in most somatic cells occur in pairs because one member of a pair comes from the mother and the other chromosome comes from the father.\n\nIn viruses, chromosomes may appear as short circular or linear structures that contain the DNA or RNA molecules.

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