Visual sentence example. She was staring at him when his visual exploration was over. Here you find articles in the encylopedia on topics related to the visual arts.

Understanding the visual elements of art is of key importance to see like an artist. Rather than looking at an object as what it represents, you will learn to see that object as an arrangement of different visual elements (shapes, textures, colors, lines, etc). This may influence your art, usually not for the better.

Visual hierarchy is a tactic many graphic designers use to achieve a layout that gets the right message across and is appealing to the eye. Below are the five components of visual hierarchy: scale, color, contrast, alignment, and proximity.

In examining the text, it is clear that the story relies heavily on its visual elements to communicate emotion, depth and theme to the reader. Particularly through the use of color, line, space and point of view, the author conveys important themes, such as the transition between captivity and freedom.

1. Note that most living matter consists primarily of the so-called bulk elements: oxygen, carbon, hydrogen, nitrogen, and sulfur—the building blocks of the compounds that constitute our organs and muscles. These five elements also constitute the bulk of our diet; tens of grams per day are required for humans.

Scientists believe that about 25 of the known elements are essential to life. Just four of these – carbon (C), oxygen (O), hydrogen (H) and nitrogen (N) – make up about 96% of the human body. The human body functions as a result of a large number of chemical reactions involving compounds of all of these elements.

The most important function of hydrogen in the human body is to keep you hydrated. Water is made up of hydrogen and oxygen and is absorbed by the cells of the body. Therefore, it is a crucial element which is used not in our body but also as a fuel, in military weapons etc.

Pure Element Examples

• Hydrogen (H) – nonmetal.
• Helium (He) – nonmetal.
• Oxygen (O) – nonmetal.
• Neon (Ne) – nonmetal.
• Nitrogen (N) – nonmetal.
• Carbon (C) – reactive nonmetal.
• Silicon (Si) – metalloid.
• Magnesium (Mg) – alkaline earth metal.

They are in different states, the blood is a liquid, the bone is a solid and the air we breathe in and out is a gas. The bones are made of calcium, the blood contains iron and the body is made up of a lot of carbon, hydrogen atoms showing how all of matter that makes up the body is made of different elements and atoms.

Hydrogen is a very useful element. It is used to make ammonia for fertilizers, refining metals, and methanol for making artificial material like plastics. Hydrogen is also used as a rocket fuel where liquid hydrogen is combined with liquid oxygen to produce a powerful explosion.

Hydrogen isn’t poisonous, but if you should breathe pure hydrogen you could die of asphyxiation simply because you’ll be deprived of oxygen. Because it’s highly compressed, liquid hydrogen is extremely cold. If it should escape from its tank and come in contact with skin it can cause severe frostbite.

Hydrogen: uses

• commercial fixation of nitrogen from the air in the Haber ammonia process.
• hydrogenation of fats and oils.
• methanol production, in hydrodealkylation, hydrocracking, and hydrodesulphurization.
• rocket fuel.
• welding.
• production of hydrochloric acid.
• reduction of metallic ores.

China

Steam reforming

However, as hydrogen cars densely pack their energy storage, they’re usually able to achieve longer distances. While most fully electric vehicles can travel between 100-200 miles on a single charge, hydrogen ones can get to 300 miles, according to AutomotiveTechnologies.

The two prime dangers from fuel cell and hydrogen-powered vehicles are the danger of electrical shock and the flammability of the fuel. Fuel cells power vehicles by electro-chemically combining hydrogen gas (H2) and oxygen (O2) from the surrounding air into water (H20) and electrical energy.

Disadvantage: The Use of Fossil Fuels in Hydrogen Production A common way to isolate hydrogen is to extract it from natural gas in a process called reforming. This process is costly and emits carbon dioxide, which is counterproductive to using an emission-free energy source.

Hydrogen is only as clean as the energy used to produce it. Current hydrogen vehicles use fuel cells to convert the chemical energy to power. Fuel cells are very costly because they are complex and require expensive materials such as platinum.

Expensive to manufacture due the high cost of catalysts (platinum) Lack of infrastructure to support the distribution of hydrogen. A lot of the currently available fuel cell technology is in the prototype stage and not yet validated. Hydrogen is expensive to produce and not widely available.