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What sort of digestive system does a crayfish have?

Inside the stomach, crayfish have a structure called a gastric mill. The gastric mill helps to grind food items into small pieces. Crayfish consume a wide variety of foods, including vegetative debris, fish and aquatic invertebrates. Crayfish capture food with their large claws before lowering it to their mouths, where they consume it.

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What is the formula for nitrogen monoxide?

Nitric oxide is classified as a free radical. It is an intermediate in several processes in the chemical industry. It is also produced during lightning and during combustion reactions in fossil fuel plants or automobile engines. Nitric oxide reacts with molecular oxygen to produce nitrogen dioxide, NO2. In an aqueous solution, it reacts with molecular oxygen and water to produce nitrous acid, HNO2.

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How is coal used by humans?

Coal, like petroleum, is a fossil fuel. It has a very long history of use in homes and industry. Coal differs from other rocks in that it consists of organic carbon rather than mineralized solids. It forms under special conditions where dead plant material forms in layers covered in water and mud, preventing the carbon in them from oxidizing. Coal remains in a chemically reduced form ready for oxidation. Oxidation of coal, known as burning, produces heat. It is this source of energy that man often finds useful.\nThe use of coal is not without problems. Mining endangers the lives of humans who ..

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How long does sugar stay in your blood?

In an insulin-resistant person, the pancreas produces insulin, but the body does not use it efficiently. Sugar builds up in the bloodstream, resulting in prediabetes or Type 2 diabetes. Causes of Type 2 diabetes include obesity and lack of physical activity. In Type 1 diabetes, the body fails to produce insulin and sugar accumulates in the blood. This type of diabetes is typically diagnosed during childhood.

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What is the wind speed on Mercury?

The solar wind on Mercury carries particles that slam into Mercury's exterior and carry enough energy to propel some atoms into ballistic paths that reach and replenish the planet's atmosphere. Massive magnetic tornadoes can develop on the surface of the planet when magnetic fields within the solar wind merge with Mercury's magnetic field. On Oct. 8, 2006, the unmanned MESSENGER spacecraft observed magnetic tornadoes on Mercury that were 500 miles in diameter, which is equal to one-third of the planet's radius.

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How did Thomas Malthus influence Darwin?

Malthus' work was influential to such evolutionary biologists as Darwin and Alfred Russel Wallace. His book, "An Essay on the Principle of Population" was published in 1798 and detailed many of the ideas that would influence Darwin. Malthus was born in Surrey, England in 1766 and died in Bath, England in 1834 at age 68.

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What are some features of an Ohm's Law chart?

The formula for determining electrical power can also be calculated according to Ohm’s Law by substituting electrical power expressed in watts for voltage and replacing resistance with voltage, so power equals voltage multiplied by current, or P = V x I. From this equation, it follows that power equals current squared multiplied by resistance. This formula enables formulas for voltage, current and resistance to be stated using power. An Ohm’s Law chart typically features the formulas for each value - power, voltage, current and resistance - in individual quadrants arranged in a circular or..

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What are different types of energy sources?

Renewable energy is useful for power generation, heating small spaces, hot water and transportation fuels. Some of the most popular and widely used renewable energy sources include solar energy and wind. Wind turbines, resembling large windmills, are useful for generating electricity. Solar energy comes from the sun and is useful for generating electricity in homes with the use of solar panels.\nSteam and hot water from the earth's crust is also used to generate electricity. Wood, manure and corn can be burned and used as a heat source. Hydropower is produced when water runs through a dam..

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What is the density of crude oil?

While the density of crude oil can be expressed in common scientific units, it is more often expressed in a measurement called API gravity. This is a measurement of how heavy a crude oil is compared to water. If its API gravity is larger than 10, it is lighter and will float on water, while if less than 10, it is heavier and sinks. In this measurement, light crude oil has an density of greater than 31.1° API, while extra heavy crude oil is below 10° API.

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What is Mars made of?

The atmosphere of Mars is made up of carbon dioxide, nitrogen and argon. It is so thin that it can't support liquid water, though there is water ice at the poles. Mars also has no magnetic field, though it probably had one in the past. Mars is the fourth planet from the sun, and its mass is 0.107 that of Earth.

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