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Which state of matter undergoes changes in volume most easily?

Liquids and solids have molecules that are tightly bonded together, limiting movement. Molecules can slide around each other in liquids, but they are unable to move freely. This results in liquids being able to flow, although they maintain fixed volume. Molecules are locked together in solids, preventing any changes in either volume or shape. Molecules in liquids and gases are separated, and they are able to move freely, allowing those forms of matter to change their volumes very easily.

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What does it mean to be on a quarterly basis?

The calendar year is divided into four quarters, which are often abbreviated as Q1, Q2, Q3, and Q4. The first quarter starts from January 1 and ends on the March 31. The second quarter is from the beginning of April to the end of June. The period between the beginning of July to the end of September is the third quarter, while the fourth and final quarter of the year lasts from the beginning of October to the end of December.

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Is CH4 non polar?

According to About.com, molecules with nonpolar covalent bonds do not have a dipole moment because the sharing of charges is equal. Polar molecules do have a dipole moment, where the molecule has a positive and a negative end, because the sharing of electrons between atoms is unequal. Methane is composed of one carbon atom and four hydrogen atoms. The molecular formula for methane is CH4. Nonpolar molecules are not able to interact with water, making the molecules hydrophobic, or water fearing.

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What are the main parts of comets?

NASA explains that the nucleus of a comet consists of ice, dirt, dust and other solid particles. When comets are far from the sun, they are dark and cold, with only a nucleus. The coma is a cloud of dust, gas and vapor that forms as the nucleus is heated. Since comets are constantly in motion, heat also produces a tail of gas that trails behind the nucleus. The tail is the portion of the comet that is visible to astronomers because solar radiation excites the gas molecules, giving the tail a glow-like appearance. When a comet's path again takes it far enough away from the sun, the coma an..

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How are sand dollars made?

The sand dollars found on beaches are generally the hollowed and dried skeletons of the sea urchins that grew them, and each of their features corresponds to missing parts of the whole. The short spines, which are not very useful for defense, are used for locomotion instead. Sand dollar skeletons bear five grooves that somewhat resemble flower petals. These grooves hold double rows of pores the sea urchins use to breathe. They also hold tube feet that are also used for respiration, not for locomotion as with many other echinoderms like sea stars. Their shells have a small hole in the center bo..

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How strong is plastic wrap?

Plastic wrap is a commonly used kitchen material composed of PVC (polyvinyl chloride). PVC's chemical qualities make it very resistant to air flow and molecule sharing, making it an excellent choice for food storage and preservation. In July of 2004, a new kind of plastic wrap hit the shelves. Made of a slightly more environmentally-friendly composition, the new plastic wrap is commonly referred to as Saran Premium and it biodegrades significantly easier.

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What is the electron configuration for magnesium?

By looking at an atom's electron configuration, it is possible to determine how many energy levels the atom has, how many electrons are in each energy level and how many electrons are in the atom's outer energy level.\n\nWhen looking at each part of an atom's electron configuration table, the first number refers to the energy level. The lowercase letter refers to the sub-shell. The second number refers to the number of electrons in a particular sub-shell. The first part of the magnesium electron configuration — 1s2 — indicates there are two electrons in sub-shell p of the fi..

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What are some examples of electromagnetic energy?

All these forms of electromagnetic energy do different things. Visible light makes objects discernible to the human eye and enables plants to carry out photosynthesis, infrared emits heat and X-rays enable us to image the internal structures of the human body for noninvasive medical examinations, to name only a few examples.\nThe different forms of electromagnetic energy all have some shared characteristics, however. First, all electromagnetic energy forms move in waves. The length of the wave actually determines the type of electromagnetism; extremely short waves are high-energy forms, such a..

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What does acid rain do?

The effects of acid rain are more palpable in aquatic environments, such as marshes, rivers, lakes and streams. Most surface waters have a pH level between 6 to 8; when acid rain falls directly on the water or runs off from the land and reaches the streams, the water's acidity increases. A body of water with a low pH level cannot sustain new life. Marshes, with their fragile ecosystems, may suffer most from the loss of a species of fish, as the animals in such ecosystems depend on each other to thrive.\nAcid rain also prevents plants and trees from growing healthily. When acid rain falls ..

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What is the difference between static and dynamic loads?

Other examples of dynamic loads include wind blowing on the face of a building, water sloshing in a jar and dice bouncing up and out of a can. The variations of dynamic loads can be due to changes in mass, direction of movement, pressure or speed of movement.

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