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What comet is visible from Earth?

There have been many visible comets from Earth, but only a few earned the title of "great comets." To be identified as such, a comet must be bright and visible to the naked eye on a dark sky. Also, it must be very visually impressive; this can only happen when it has a large, active nucleus and it comes particularly close to the sun or to the Earth. Usually, great comets produce large amounts of gas and dust, which create visually striking tails.

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Why do men sweat more than women during intercourse?

Science Daily, citing the Japanese study, asserts that the reason men sweat more than women may be due to an evolutionary change. As women have less fluid in their bodies compared to men, they dehydrate more easily. Being less prone to sweating, even during physical activities and higher environmental temperatures, preserves the fluids in the body of a woman.

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What is layered rock called?

Sedimentary rock is categorized as either clastic, chemical or organic. Clastic sedimentary rock is composed of small pieces of broken rock, while chemical sedimentary rock is composed of dissolved minerals. Organic sedimentary rock is composed of calcium deposited by organic processes.\nSedimentary rock lies in a thin layer over igneous rock on most of the earth's crust. Fossils can be sorted by age according to where they are located in sedimentary rock Older fossils occur in the bottom layer of sedimentary rock.

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How many amps does 1500 watts use?

The relationship defined by Ohm's Law is:\nI = V / R\n\nI is the current in amps, V is voltage in watts and R is resistance in volts.\n\nAn amp measures the amount of electrical charge that passes through a point in a circuit. A volt represents the potential for energy movement, similar to water pressure in a pipe. A watt is a unit of power, measuring work done when 1 amp flows through 1 volt of electrical potential difference.\n\nIn other countries that utilize voltage of 220 watts, 1500 watts would use 6.81 amps.

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What are the benefits of methane?

Methane is naturally an odorless and colorless gas which is less dense than the major gases in air. It is the simplest hydrocarbon, with one carbon atom bound to four hydrogen atoms in each molecule. It constitutes about 75 percent of natural gas, with the next simplest hydrocarbon, ethane, which has two carbon atoms and six hydrogen atoms, constituting another 15 percent. The University of Wisconsin notes that most fuel applications, sulfur compounds are added to natural gas to give it a scent and make it more detectable. Concentrations about 5 percent are explosive in air, and high levels ca..

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What is the difference between balanced and unbalanced forces?

Literally any object that is not moving is influenced by balanced forces, as there is nothing that is not influenced by at least gravity. A rock does not move under the influence of most winds, because the force exerted by friction with the ground exactly matches the force exerted by the wind. Similarly, it does not sink through the earth because the force of its weight is exactly matched by the resistance of the materials beneath it. Objects in a constant state of motion, that is, motion at a constant speed along a straight line, are also under balanced forces.\nIn any other case, when an obj..

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Is the basic unit of volume in the metric system the gram?

The gram is the basic unit of mass. The volume occupied by a certain mass depends on the density of the matter. Pure water is the reference for density because one gram of water occupies one milliliter of space. Water is the only substance where the mass of the matter is equivalent to the volume.

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What is Benedict's test?

Reducing sugars are simple types of sugars, including monosaccharides and many disaccharides. These sugars contain aldehyde groups or form aldehyde groups through isomerization. These aldehyde groups produce special characteristics in these sugars, such as the Maillard reaction, which causes foods with simple sugars to brown when cooked.\nWhen a Benedict's test for reducing sugar is used in a solution that contains a reducing sugar, the sugar interacts with copper in the Benedict's solution. This leads to oxidation and a precipitation of the oxidized copper in the solution. As the co..

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When is the next red moon?

The 2014 and 2015 blood moons occur during a series of four lunar eclipses. The series of four total lunar eclipses is known as a tetrad. When the moon passes through Earth's shadow, the moon takes on red light taken in by the Earth from sunrises and sunsets. CNN reports that, according to NASA, the color of the moon during an eclipse depends on what is in Earth's atmosphere at the time.

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What are some facts about the Earth for kids?

Earth has unique geological features. Mount Everest is the highest mountain on the planet. The rocks at the bottom of the Grand Canyon may be two billion years old. Magma is hot liquid rock under Earth's surface and appears as lava when a volcano erupts. Talc is the softest mineral on Earth. Hawaii moves 10 centimeters closer to Japan every year due to the movement of tectonic plates. Earth is slightly flat at the North and South poles. The planet has fewer craters than Mars, Venus and Mercury due to its geological activity.\nEarth also has unique geographic features. The Sahara is the la..

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