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What is the shape of an onion cell?

As a plant, the cells of an onion have organelles or components that include membrane walls, nuclei and cytoplasm. A plant cell also has a cell wall and a large vacuole. The function of a vacuole is to store fluid and solid materials. The cell wall is made up of cellulose.There are some similarities and differences between plant and animal cells. One main difference is that animal cells have a round shape while plants cells are rectangular. Some similarities between the two are that each cell type has a nucleus, ribosomes and mitochondria.

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What is the launch schedule for Cape Canaveral?

As it gets closer to launch date, an estimated launch time is added to the schedule. Since launches are often governed by the weather or other factors, they may not depart on time.\nThe best place to view the launch is from the Kennedy Space Center, about 7 miles from the launch pad. A limited number of tickets are available and they include transportation. These are available for sale online. Other prime viewing sites are found along the Indian River, at the U.S. Space Walk of Fame exhibit, Playalinda Beach and from the Cocoa Beach Pier. The Jetty Park Campground at Port Canaveral also has ex..

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What is the chemical formula for aluminum oxide?

Aluminum oxide occurs naturally in minerals such as corundum. It does not conduct electricity, but it conducts heat. It is insoluble in water. It is obtained industrially from bauxite ore. It is used as a filler for plastics, as a catalyst or catalyst support, as an abrasive because of its hardness, and as a refractory material because of its high melting point.

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What are examples of unsaturated solutions?

An example of an unsaturated solution is a teaspoon of sugar in a glass of water. If one adds a teaspoon of sugar to a glass of water, it dissolves, and one can still add more sugar to it because it is still unsaturated. However, at some point, the sugar no longer dissolves in the water because the substance is saturated. In other words, the solution has reached its saturation limit. The same process holds with salt and water, a small amount of salt in a large bucket of water dissolves, and the water is considered an unsaturated solution. Iced tea and coffee can also be considered examples of ..

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What are the most conductive metals?

Conductivity is defined as the ease with which an electric charge or heat passes through a metal. A conductor gives little resistance to the flow of electric current or heat, which means that a conductor allows an electric charge to flow freely through it. Conversely, an insulator resists the flow of electricity. Ceramics, wood and plastics are considered insulators. Thermal conductivity refers to the ease with which heat passes through a conductor or insulator. Electrically conductive metals typically are also thermally conductive.From most to least conductive, the top 10 metals are:SilverCop..

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Is HBr a strong acid?

There are five other strong acids: hydrochloric acid, nitric acid, sulfuric acid, hydroiodic acid and perchloric acid. Strong acids can be useful for creating chemical reactions in a laboratory. The human body uses hydrochloric acid in the stomach to aid in food digestion. Strong acids are also dangerous chemicals. They can be a fire hazard or cause chemical burns to the human body.

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What is an example of the law of conservation of mass?

If the total mass of the compounds resulting from burning the paper are weighed, it still equals the mass of the paper. In a chemical reaction, two molecules of hydrogen gas (H) combine with one molecule of oxygen gas (O2) to form one molecule of water (H2O). Evidently, no matter has been destroyed. Another example that illustrates this law is the heating of 10 grams of calcium carbonate (CaCo3), which produces 4.4 grams of carbon dioxide (CO2) and 5.6 grams of calcium oxide (CaO). In this chemical reaction, the total mass of the resultant products is equal to the total mass of the reactants.\..

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What does "ontogeny recapitulates phylogeny" mean?

According to this theory, fetal development resembles ancestral forms and goes from one form to the next in chronological order. The youngest fetus resembles the oldest ancestor, and so on. However, this is not the case. While the fetuses of air-breathing animals retain gills until a certain stage, the gill stage does not necessarily resemble the adult form of any evolutionary ancestor. Instead, fetal development often resembles the developmental forms of its ancestors; the embryos of both chickens and humans resemble the embryos of fish and lizards.

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How many pounds equal a kilonewton?

An acceleration of 32.2 feet per second per second is the same as that produced by gravity on a mass of one pound. Although the pound is ordinarily used in commerce in the U.S., SI units are preferred in scientific work. The SI unit of mass is kilogram, while the SI unit of force is the kilonewton.

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What is the thermal efficiency of a heat engine?

Heat engines transform any inputted thermal energy into mechanical power, but the process is not entirely perfect; some of the thermal energy is outputted to the environment as waste heat, and some of it is lost through the mechanical friction in the engine itself. The best heat engines are about 50 percent efficient, which means that most of the thermal energy inputted eventually becomes a waste of resources.\nEven in an ideal, frictionless engine, the second law of thermodynamics places limits on the maximum efficiency of an engine. This efficiency is known as the Carnot efficiency, which ca..

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