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What is the process of transferring energy from hot to cold objects?

The molecules within a hot object tend to be more disordered with a higher kinetic energy. This means they move around more rapidly and undergo more frequent collisions with other molecules. When the molecules of a hot object collide with those of a cold object, the kinetic energy is transferred from the hot molecule to the cold molecule, thus increasing the kinetic energy of the molecules in the cold object. The change in average kinetic energy of the molecules is recorded as a change in temperature.\nHeat energy can be transferred from a hot object to a cold object through conduction, convec..

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What is the effect of soil erosion?

Soil erosion is caused by rain, improper farming techniques and wind. When erosion occurs in soil, it typically involves the removal of the top layer. This layer is the topsoil and contains many nutrients essential to supporting plant life. When the topsoil is removed, the quality of the soil is reduced. This results in less plant life growing in the affected area. Plants bind soil together with their roots, and if they are unable to grow in the soil, erosion may be accelerated. Soil erosion can lead to the destruction of animal habitats, forcing them to relocate. Water causes soil erosion by ..

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What kinds of rocks do geodes occur in?

While quartz crystals are common inside geodes, many different types of crystals can form depending on the mineral content of the water that passed through the structure. Agate, amethyst, chalcedony and jasper are frequently found in geodes, as are calcite, dolomite and celestite crystals. Typically, the interior surface of the hollow fills entirely with crystalline growths, creating a closed, rounded structure that eventually breaks free of the surrounding rock and reaches the surface due to seismic activity. The colors inside a geode may be uniform, or there may be multiple colored bands, mu..

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What natural resources are present in Cuba?

As of 2014, the top export item in Cuba's economy is raw sugar, making up 25 percent of all products exported from Cuba to the world. The next four big exported Cuban resources are refined petroleum at 15 percent, nickel mattes at 14 percent, rolled tobacco at 14 percent and hard liquor, namely rum, at 6.7 percent. The top five countries that receive these exports from Cuba are China, which receives 30 percent of Cuba's exports, Spain at 11 percent, Brazil at 5.1 percent, Belgium-Luxembourg at 5 percent and Italy at 3.2 percent.\nThere are also several companies based in Cuba that ha..

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Who discovered genes?

The discovery of genes came from many different scientists over many different years. Each scientist expanded upon the work of scientists who came before them to delve more into the idea of genetics. It wasn't until the late 19th century and early 20th century that chromosomes and genes were first observed.

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What is the molar mass of Al?

Aluminum is a silver-white metal that is nontoxic and very light. It is not magnetic and does not conduct electricity. Aluminum is malleable and can be purified easily through an electrolytic reaction. The metal also can form alloys with copper, magnesium, manganese and silicon. It is abundant in the Earth’s crust and is utilized in many industrial products due to its properties and availability.

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Is NH3 a polar or a non-polar molecule?

The trigonal pyramidal arrangement of the atoms in the ammonia molecule contributes to its polarity. The nitrogen atom in the ammonia molecule has an electron pair, which makes ammonia a proton acceptor. The polarity of the ammonia molecule makes it miscible with water. In high concentrations, ammonia is corrosive and hazardous. Household ammonia is a solution of ammonia in water.

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How can you build a vertical wind turbine?

To assemble the frame, use three 32-inch long 2-by-4-inch boards for the top and bottom. Cut two more 2-by-4-inch boards 72 inches in length for the sides. Attach the side boards to the bottom board with screws, and drill a 1/2-inch hole into the center of the bottom board. Place the bicycle tire rim without blades onto the bottom board with its center on the hole.\nDetermine the distance between the tire rim on the bottom board to the top of the rim holding the blades. Add 1 inch, and screw the two top beams into the side boards at that height. Cut a 2-by-6-inch board 24 inches in length to u..

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What is the degree of transparency for gold?

The three degrees of transparency are opaque, transparent and translucent. If a mineral is translucent, it's possible to see light coming through the mineral. It is also possible to see objects through a transparent mineral. If a mineral is opaque, it is not possible to see objects or light coming through the mineral. Gold is not the only mineral that is opaque, but it is one of the most common. Pyrite, magnetite and graphite are some other common examples of opaque minerals.

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Why does light travel faster than sound?

Sound waves can be compared to ripples on the surface of water after a pebble is thrown into it; the water surface becomes compacted in certain areas and radiating waves can be observed. Sound can only travel through mediums where the density of molecules is high enough to create a wave.Air is the most common medium for humans to experience the movement of a sound wave. The speed of sound in air, as in any medium, does not depend on the qualities of the sound, such as amplitude, but only on the nature of the medium and its characteristics. For air and other gases, these will include temperatur..

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