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How do seat belts work in terms of the three laws of motion?

While a passenger often does not realize it, his body is simply an object in motion when traveling in a vehicle. It continues in motion until it is compelled to stop, even when the vehicle stops suddenly during the crash. The seat belt spreads the force across the torso and waist during this stop.\nNewton's second law states "Force is equal to the change in momentum per change in time." This translates to F=MA, where M is the passenger's body weight and A is the acceleration. In the sudden stop of a vehicle, its acceleration is the speed it is traveling minus zero, the speed when sto..

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What is the Lewis structure of CS2?

Lewis structures for molecules are typically written through trial and error unless they are already known. The method for figuring out a Lewis structure requires that all of the valence electrons are accounted for, and all of the atoms in the structure end up with a full shell of valence electrons.\nFirst, connect all of the atoms using the electronegativity of the elements to determine which atoms go where. Typically, if you have a carbon atom and several other atoms, the carbon atom will be in the center. In the case of CS2, the carbon atom is less electronegative and forms the center.\nNex..

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What is the name of the compound with the formula SrCl2?

Along with strontium carbonate, citrate and gluconate, strontium chloride belongs to the group of strontium salts. Strontium chloride is used in a wide range of dietary supplements. It is also an important ingredient found in toothpastes used to reduce teeth sensitivity. A radioactive form of strontium called strontium-89 chloride has significant effects in reducing pain caused by some forms of cancer. Strontium has four stable isotopes and several radioactive isotopes.

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What do damaged nerves look like compared to healthy nerves?

Myelin is the fatty substance that surrounds the nerve fibers in people's brains, spinal cords and optic nerves. Aside from serving as insulation, it also helps the nerves in sending electrical signals. When the myelin covering is damaged and scar tissue forms, the nerves are not able to properly transmit messages that dictate the body's speech, movement and other functions.\nOne symptom of nerve damage is numbness, which indicates an inability to transmit information. Others are pain and tingling, which are signs that the nerves are sending out false signals.

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Is a giant puffball poisonous?

Before maturity, the inside of a puffball has a dense, white texture, which indicates it has not developed spores and can be eaten. When it has matured and spores have begun to form, the inside is yellow to brown in color and cannot be eaten. Eating the wrong species can be fatal, and mushrooms must be correctly identified to be safely consumed.

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What is accumulation in the water cycle?

In winter, water accumulates as ice and snow, and when weather gets warmer, snowmelt runs off into streams, lakes and rivers. In colder climates, frozen precipitation can gather as massive glaciers that keep water locked up for thousands of years.\nLiquid precipitation flows over land as surface runoff. This runoff goes to lakes and seeps into the ground for freshwater accumulations. Oceans are the largest accumulations of water on Earth.\nSome precipitation goes deep into the ground to replenish subsurface aquifers. This type of water is called infiltration. This infiltration can come back up..

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What is a photometer used for?

The different types of photometers include a built-in photometer, a spot photometer, a color photometer, a handheld photometer and an incident light photometer. In photography, photographers can better deal with light radiance variances by allowing them to control and set their exposures. This is true for even a single photographic subject, including items and people.

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How much would 100 million pennies weigh?

However, this answer has a caveat. Contrary to popular belief, a modern penny is largely made from zinc and only plated with copper. According to About.com, prior to 1982, pennies were made from 95 percent copper, but those minted after 1983 are 97.5 percent zinc and only include a thin coating of copper. Since copper is heavier than zinc, the pennies made before 1983 weighed 3.11 grams. So, in essence, this answer could have several different values depending on how many pennies out of the 100 million were made before 1983.

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How many atoms are in an H2O molecule?

Water is a highly polar molecule due to its negative electron pairs on the oxygen atom. Each hydrogen atom is slightly positive, but as a whole, water molecules have a negative dipole pointed towards the electron cloud above the oxygen molecule. Due to water’s polarization, it can interact with itself and form strong bonds. Water molecules interact with each other via hydrogen bonds in its gas, liquid and solid forms.

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Why is molecular shape important?

The shape of a molecule determines the way it behaves in nature, and molecular shapes are described by using geometrical terminology. The very nature of a molecule is dependent upon the shape as well as the electron shift in bonding. The shape of a molecule influences the physical and chemical properties of the elements involved.\nDetermining the shape of a molecule is essential to understanding molecules in chemical reactions. Enzymes have the ability to differentiate between functioning molecule groups by shape recognition. Bio-synthetic pathways that produce natural products use shape recog..

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