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What causes optical illusions?

Optical illusions, however, are not always caused by repeating patterns. One example of this is when people see stars when they hit their heat really hard. People know they are not actually seeing stars, but the hard blow to the head causes neurons in the eyes to become visible for a short period of time. These neurons are misinterpreted by the brain as being light, so they closely resemble stars that people see in the night sky.\nThe term optical illusion is not the best way to describe this phenomenon, according to ABC News. It is best to call them visual illusions, because the illusion is c..

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What are some safety precautions for hurricanes?

Families should disaster-proof their homes when a hurricane is a day or two away, especially if they live in coastal areas frequently ravaged by storms. Set up a backup generator a safe distance from the house to prepare for power outages. Move outdoor furniture and appliances inside, if possible.\nReduce the risk of damage from wind and driving rain by closing windows throughout the house. Families in major flood zones should consider installing storm shutters or boarding up windows before a big storm. Fill all cars with gas in advance, and secure garage doors to protect any expensive propert..

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What are some memorable NASA launches?

Apollo 11 was a historic launch that took astronauts to the moon. In July 1969, Neil Armstrong stepped on the moon to become the first human to accomplish this feat. Some other famous moments in NASA's history are the first American in space in May 1961 and the first Gemini mission in 1965, as stated by NASA. The first American in space was Alan Shepard aboard the craft Freedom 7. The first Gemini mission in 1965 was a precursory test flight prior to the lunar missions. The astronauts aboard that flight were Gus Grissom and John Young. Gus Grissom died in an accident during the Apollo 1 l..

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What animals eat butterflies?

Butterflies can be found in terrestrial, temperate, polar and tropical climates and tend to live close to food plants that their young depend on. Butterflies are primarily active during the day and eat the flowers and leaves from plants. The majority of butterflies live for about a year, while some species can live for as long as two to three years.

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What is coal made of?

Coal is a fossil fuel used in producing steel and generating electricity. Due to the differences in coal, engineers design power plants that use it for a fuel to operate using the available feedstock while also reducing emissions, including sulfur and mercury. Harder forms of coal generally provide more energy than softer forms. Anthracite, the top-rated form of coal, provides 30 Millijoule per kilogram of energy. In comparison, lignite, also known as brown coal, provides only 5.5 to 14.3 Millijoule per kilogram.

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How many miles is it possible to drive per gallon of gas?

Math.com offers a calculator that allows users to insert the number of miles driven and the gallons of gas used to find out how many miles they can drive per gallon, while InflationData.com has a formula for calculating the miles per gallon for a specific car. Take note of the mileage at the start of the tank and at the end to determine the miles per gallon.

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What color is the moon?

The surface of the moon is made primarily of light gray rock, but the dark gray spots that can be seen on the moon are from volcanic craters. The more titanium that is present on the surface of the moon, the darker the color will be. Some pieces of the surface of the moon are more of a brown-gray color and some are closer to a white color.The color of the moon that is seen in pictures from space most closely resembles the true color of the moon. Since there is less reflection from the sun during the daytime, the moon will often appear white from the Earth during the day. At night, the moon gen..

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Does baking soda lower the temperature of water?

Endothermic chemical reactions require additional energy in order to make the reaction go. These reactions take place at a much slower rate than exothermic reactions do. The temperature must be raised manually in order to make the molecules react. Evaporation is one type of endothermic reaction. It requires heat in order to create vapors.

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Are nandina berries poisonous?

Nandina domestica, known as nandina or heavenly bamboo, is a flowering plant in the family Berberidaceae. It is native to Japan, India and central Asia and was introduced to the west in 1804 by William Kerr, who first sent it to London. It is commonly grown as an ornamental plant in gardens.

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How many trees would make a ream of paper?

The exact amount of paper produced varies by size and type of tree. Pine trees are the most common source of paper. The type of wood used also depends upon the paper product. It takes about 24 trees to make a metric ton of plain white copy paper but only 12 trees for the same amount of newsprint. A metric ton is equal to 1,000 kilograms or 2,205 pounds.

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