As the elevator (lift) moves to the top of the ramp, the skier's potential energy increasing .
What is potential energy?Potential energy is a form of stored energy that is dependent on the relationship between different system components. A spring has more potential energy when it is crushed or stretched.
A steel ball has far more potential energy raised above the ground than has after falling to Earth. In the raised position it is capable of doing more work.
Potential energy is a characteristic of systems rather than of particular bodies or particles; for instance, the system made up of Earth and the raised ball has more potential energy as they become further apart.
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Is mercury, hg, an element, a compound, a homogeneous mixture, or a heterogeneous mixture?
Hg is a heterogeneous mixture, not a homogeneous mixture.
In chemistry, a mixture is a substance consisting of two or more different chemical substances that are not chemically combined. A mixture is two or more substances physically combined in which they retain their identity and are mixed in the form of solutions, suspensions, and colloids.
A mixture is formed when two or more different substances are physically combined and can be separated into their original substances. A chemical reaction occurs when two or more substances combine to form a new substance that cannot be converted back into the original substance.
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Give an example of a pair of isotopes of the same element. Explain how they are similar and how they are different.
Please help, no bots!
An example of a pair of isotopes of the same element is Hydrogen and Deuterium. They are similar because they have same atomic number and they are different because they have different mass number.
What is Hydrogen ?Hydrogen is a chemical element with the atomic number 1. It is represented with symbol H. Mass number of hydrogen is 1. Hydrogen belong to group 1. It belongs to period 1. Hydrogen is s-block element.
What is Deuterium ?Deuterium is isotope of hydrogen. The atomic of deuterium is 1. The mass number of deuterium is 2. It is also known as heavy hydrogen. It is represented as D or 2H.
Thus from the above conclusion we can say that a pair of isotopes of the same element is Hydrogen and Deuterium.
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Which organ absorbs water and some minerals and vitamins while also passing waste material to its lower portion?
The small intestine is the site of digestion and absorption of minerals and vitamins and the rest of the water material is passed into the large intestine.
The small intestine has a highly coiled structure of about 7.5 meters in length. In the small intestine, the acidic chyme is mixed with pancreatic juice, bile juice, and intestinal juice and comes into contact with the enterocytes present in the villi. Digestion of all nutrients is complete. Carbohydrates get broken down into monosaccharides. Proteins are broken down into amino acids. Absorption of nutrients through the enterocytes occurs through diffusion, osmosis, facilitated diffusion, and active transport. Water present in the digested food is absorbed by osmosis. Smaller fat-soluble substances (fatty acids and glycerol) diffuse through the cell membranes. Larger molecules are transported inside the villi by other transport mechanisms.
Monosaccharides and amino acids move into the blood capillaries present in the villi. Fatty acids and glycerol move into the lacteals and the thoracic duct through the lymphatic vessels. From there, they enter circulation. Some proteins are absorbed unchanged. For example, antibodies present in breast milk or poliomyelitis vaccine are absorbed directly. Vitamins, minerals, and water are absorbed from the small intestine into blood capillaries. Fat-soluble vitamins are absorbed along with fatty acids and glycerol into the lacteals. Vitamin B2 is absorbed in the terminal ileum. Out of all the fluid entering the alimentary tract every day, only 1500 ml is not absorbed in the small intestine and passes into the large intestine.
Therefore, the small intestine is the site of digestion and absorption of minerals and vitamins and the rest of the water material is passed into the large intestine.
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The approximate diameter of the spherical nucleus of hydrogen-1 atom is 1 x 10-13 cm. estimate the density (g/cm3) of matter in a proton of mass of proton is 1.673 x10-24 g.
The density is 3.193 × 10^15 g/cm3.
Given;
Diameter = 1 x 10-13 cm
Mass = 1.673 x10-24 g
Volume = 4/3πr^3
Volume = 4/3 × 22/7 × (1 × 10^-13 / 2)^3
Volume = 11 × 10^-39 / 21
Density = Mass / Volume
= 1.673 x10-24 / 11 × 10^-39 / 21
Density = 3.193 × 10^15 g/cm3
What is density?
The amount of objects, including people, animals, plants, and other living things, that are present in a region is known as the density. The number of objects is divided by the area to determine density. The number of inhabitants in a nation divided by its size, measured in square kilometers or miles, is the population density of that nation.
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(e) A 0.050 mol sample of a hydrocarbon was burned in excess oxygen.
The products were 3.60 g of water and 6.60 g of carbon dioxide.
(i) Calculate the number of moles of carbon dioxide produced.
Relative atomic masses: C = 12; O = 16.
Moles of carbon dioxide =
*
(2)
The correct answer is 0.15.
We are aware that there is 0.05 mol of an unidentified hydrocarbon we will refer to as "X" and that its burning produces 6.6 g of carbon dioxide and 3.6 g of water.
These quantities might be converted to moles by applying the following formula:
amount= mass/ relative atomic mass
Thus, the following equation may be written for H2O: moles = 3.6 / 18 = 0.2 and for CO2: moles = 6.6 / 44 = 0.15.
0.05X + x'O2 = 0.15CO2 + 0.2H2O
This may be made simpler by dividing through by 0.05 (this step is likely to be the most helpful to you), resulting in:
1 x + x O2 = 3 co2 + 4 H2O
The hydrocarbon must have been the source of all the carbon in the carbon dioxide and all the hydrogen in the water.
Accordingly, 4 x 2 = 8 moles of H and 3 x 1 = 3 moles of C.
There are 3/1 = 3 Cs and 8/1 = 8 Hs in one X molecule.
This clearly identifies C3H8 or propane as the hydrocarbon X (dividing by 1 seems unnecessary, but it illustrates the process to use if there were more than one mol of X in the first equation).
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The web's ______ advantage allows for data and resource sharing that enables communication with a website.
The web's connectivity advantage allows for data and resource sharing that enables communication with a website.
In our daily lives, communication helps us build relationships by allowing us to share experiences and needs and connect with others. It is the essence of life that allows us to share We all need to communicate.
In our daily lives, communication helps us build relationships by allowing us to share experiences and needs and connect with others. It is the essence of life that can be shared. We all need to communicate. Effective communication results in a sense of satisfaction and accomplishment for all involved. Clearly communicating your message leaves no room for misunderstandings or message changes, and reduces the chance of conflicts.
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Most americans overconsume? calcium. fiber. added sugars. potassium.
Most americans overconsume calcium. fiber. added sugars. potassium because in calcium, fiber added sugars, potassium has an healthy and nutrition food and it does't cause diseases.
Adequate intake of calcium is necessary for bone health as well as for basic biological functions such as nerve transmission, vasoconstriction, vasodilation, and muscle contraction. adequate potassium intakes are associated with optimal blood pressure and may reduce the risk of developing kidney stones and bone loss. fiber may protect against cardiovascular disease, obesity, and type 2 diabetes, and it is essential for digestive health. that's why most american's overtake this calcium, fiber added sugars, potassium
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