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What kinds of animals live in the desert?

Desert bighorn sheep live in the Mojave, Sonoran and Chihuahuan deserts. This animal is very sensitive to land quality, and it is one of the only desert animals to perspire and pant to remain cool.Scorpions live in every desert in the world. They have a venomous barb at the end of their tails, and African scorpions can grow to be 8 inches long.Ostriches live in the Kalahari and Sahara deserts. They have a lifespan of 40 years and can run approximately 40 mph.Kangaroo rats live in the Sonoran, Mojave, Great Basin and Chihuahuan deserts and are some of the smallest desert-dwelling creatures. The..

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Why does water evaporate?

All evaporation occurs at the surface of the water. Heat helps water molecules move at a faster rate. When they get moving fast enough, individual molecules have the ability to break free from the others that remain in liquid water to become gas. While increasing temperature generally helps, decreasing atmospheric pressure generally helps water evaporate, too. Decreasing pressure decreases the temperature that water needs to reach in order to evaporate. When boiling water at a high altitude, the water boils and evaporates at a lower temperature than water at sea level. This is because the pres..

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What are the ice crystals that fall from the sky?

Snow forms when droplets of liquid condensation in clouds freeze to create a crystalline structure. Snow forms best when air is able to push upward, carrying moist, often warmer, air into colder parts of the atmosphere to begin condensation. Lake-effect snowfall is common around larger bodies of water; the warmer air of the lake evaporates and is borne high into the atmosphere, where it condenses and freezes to form ice crystals. Snowflakes are simple ice crystals, however, snowflakes may pass through additional clouds on the way to the ground. When this occurs, condensation from the clouds fr..

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What is nuclear force?

Opposite electrical charges attract each other, and like charges repel each other with the electric force. In every element but hydrogen, this force is present within the nucleus. Every element except hydrogen has more than one proton, and each proton has an identical positive charge. This produces an electric force pushing the protons apart. If some force did not counter the electric force, all atomic nuclei would dissipate, leaving hydrogen as the only element in existence.\nNuclear forces also hold neutrons, particles with a similar mass to protons, within the nucleus. Every element but hyd..

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What are live and neutral wires?

An electric current refers to the movement of an electrical charge along a conductor. The amount of electrical flow depends on voltage and resistance, which is mathematically represented by the equation I = V/R, where I denotes electric current, V represents voltage and R indicates resistance.In electrical appliances, three types of wires are commonly used for safety purposes, which include live, neutral and earth wires. When the appliance is in good working order, earth wires are not necessary. However, faulty live wires require earth wires to discharge a large amount of electric current.

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How do I describe the Bohr model of the hydrogen atom?

Niels Bohr unveiled his model in 1913 and successfully predicted the structure of the hydrogen atom. The concept is based on the theory that electrons could only exist in specific energy orbits. The orbit closest to the proton had the lowest energy and energy increased further from the proton. A photon could knock the electron out of its orbit and into a higher energy orbit, causing an absorption of energy, or fall into a lower energy orbit, creating a release of energy. The lowest and most stable energy orbit was called n=1 and each orbit was numbered sequentially from there.\nBohr's mod..

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What happens during a torn knee cartilage surgery?

Before treatment, doctors examine the affected knee and discuss the patient's medical history, notes the American Association of Orthopaedic Surgeons. Imaging tests using MRIs, X-rays and similar imaging technologies may be recommended in certain cases. If the tears are small, no surgery is required. Instead, patients are required to follow the RICE protocol: rest, use ice packs several times a day on the damaged knee, wear a compression bandage, and elevate the affected leg during rest.\nIf the tears are large, normal surgery or arthroscopic surgery is the typical treatment option, notes..

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What is the importance of the exosphere?

The exosphere is found on the very boundaries of Earth's atmosphere. Just underneath the exosphere is the thermosphere, which shrinks and expands according to how much ultraviolet radiation is coming through the exosphere.\nAccording to the National Center for Atmospheric Research, some scientists don't even consider the exosphere a part of Earth's atmosphere. They consider it a part of outer space, as there isn't a distinct upper boundary of the exosphere.\nThere is a region in the exosphere called the geocorona. This is where the sun's radiation exerts pressure on hy..

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How does friction affect motion?

There are many types of friction. Sliding friction is what occurs when a car stops, and it happens when there's resistance that causes a moving object to slow down. Another type is static friction, which relates to how much force is required to move things that are at rest. More force is typically needed to move an object at rest.

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What two planets rotate clockwise?

Because Venus is the second planet from the sun, it is a very inhospitable planet due to the heat and high surface pressure. It takes 225 Earth days for Venus to rotate about the sun.\nUranus is an outer giant planet and has an atmosphere that contains the gas methane. William Hershel discovered this planet in 1781. Its rotation around the sun is 84 Earth years. Uranus orbits on its side; a collision with another massive object caused the tilt.

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