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What are the properties of paper?

Blotting paper is a type of paper used to absorb ink because it has a high moisture retention capacity and can absorb liquids. Cardboard paper is hard and difficult to fold. Paper used for writing is often soft, smooth, glossy and lightweight.\nPaper is made from wood pulp and is primarily used for writing, printing and packaging. The making of paper began in China almost 2,000 years ago.

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What is the force that always opposes motion?

Several types of friction exist. Dry friction refers to the resistance of lateral motion between two dry surfaces. This resistance can either be static, when the bodies are not moving, or kinetic, when they are moving. Fluid friction, also known as viscosity, occurs when layers of a fluid are moving relative to each other. Lubricated friction occurs when a fluid separates two solid surfaces.

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What is a sentence with "tropical rainforest" in it?

Rainforests are usually called tropical because they tend to grow near the equator, between the Tropic of Cancer and the Tropic of Capricorn. They are characterized by year-round temperatures above 68 degrees Fahrenheit and consistently high annual rainfall of no less than 66 inches a year. Major tropical rainforests include the Amazon Rainforest in South America, the Ituri Rainforest in Africa and the Harapan Rainforest in southeast Asia.

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What are investigatory projects that are related in physics?

In some cases, not enough funds are available to purchase materials necessary for a lab or school classroom. Finding ways to create these materials allows an educator to save money while still demonstrating the concept to the class. Such was the case when educators decided to build and test the effectiveness of a free-fall apparatus used in elementary and secondary-level physics classes. This was necessary because many public schools lack the funding to purchase such equipment.\nA free-fall apparatus is used to measure the time it takes for a falling object to hit the switch pad from a certain..

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How does someone convert 130 degrees Fahrenheit to Celsius?

German physicist Daniel Gabriel Fahrenheit developed the Fahrenheit scale in the early 1700s. In 1742, the Swedish astronomer Andres Celsius created the Celsius scale after the Fahrenheit scale had already been largely adopted. The Celsius scale had 100 degrees Celsius as the boiling point and 0 Celsius as the freezing point. Many considered the Celsius scale to be more precise than the Fahrenheit scale, so after Celsius' death in 1744, the scale became a new standard.

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Why is it important to preserve nature?

The natural world is governed by the laws of biology, chemistry and physics and has been since the birth of the plant billions of years ago. A healthy environment provides nutrients that flow up the food chain, from plants to animals, to provide energy. The nutrients are then recycled to repeat the process.\nBy preserving nature, the planet and all its inhabitants are guaranteed a constant supply of clean water and fresh air, according to the Nature Conservancy. Trees produce the oxygen that humans and other animals need to breathe and absorb the carbon dioxide that they exhale. Trees absorb ..

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Which enzyme is responsible for RNA synthesis?

RNA synthesis is the process of transcribing DNA nucleotide sequences into corresponding RNA sequences. The synthesis of RNA proceeds in much the same way as the replication of DNA. RNA polymerase moves along the open DNA molecule, copying one of the two strands base by base. After synthesis is complete, the RNA separates from the DNA strand, leaving a newly formed sequence that is complementary to the existing DNA code.

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What is the formula for chlorous acid?

Chlorous acid is unstable; without substantial effort to keep it intact, it often splits into two more stable acids, hypochlorous acid (HClO) and chloric acid (HClO3). Chlorous acid can be used as an oxidizing agent; however, because it is unstable, it is not particularly efficient for this purpose.\nChlorous acid is also used to form the salt sodium chlorite, a compound widely used as a bleaching agent and disinfectant in industrial settings.

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What are the effects of mass movement on people?

Mass movement is the movement of surface material, such as soil, rocks and debris, caused by gravity and other underlying conditions, such as water, wind, ice and human activity. Landslides, rockfalls and avalanches are examples of mass movement. Mass movement events typically cause over $20 billion in property damage and between 40 and 50 deaths per year in the United States. Areas of the Appalachian and Rocky Mountains and the Pacific Coastal Ranges are most affected. The effects of mass movements are commonly much more severe in underdeveloped countries. Countries such as Nicaragua, Peru an..

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In what ways are fungi similar to plants?

Although plants and fungi can appear superficially similar, fungi are actually more closely related to animals than plants. Fungi are not able to photosynthesize, which is one of the distinguishing characteristics of plants. Instead, fungi absorb nutrients from their environment and break them down through enzymes. Three different methods of nutrient absorption exist for fungi: saprobic, mutualistic and parasitic. Saprobes decompose dead animal and plant material, while parasitic fungi feed from living organisms. Mutualistic fungi function symbiotically and can benefit their hosts.\nThe reprod..

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