Category: Physics

What does negative permeability mean? Negative magnetic permeability is when a material, in response to an imposed magnetic field, forms a magnetic dipole in the opposite direction to the imposed field. As regards PLASMA in a Magnetic Field the particles gyration results in a magnetic moment countering the external field. Therefore plasma is diamagnetic. Can […]

How do you find the power of a power property? This is an example of the product of powers property tells us that when you multiply powers with the same base you just have to add the exponents. This is called the power of a power property and says that to find a power of […]

Can a fact be disproven? A basic principle in science is that any law, theory, or otherwise can be disproven if new facts or evidence are presented. If it cannot be somehow disproven by an experiment, then it is not scientific. Take, for example, the Universal Law of Gravitation. What is a opinion statement? An […]

What are 3 examples of a chemical property? Examples of chemical properties include flammability, toxicity, acidity, reactivity (many types), and heat of combustion. Iron, for example, combines with oxygen in the presence of water to form rust; chromium does not oxidize (Figure 2). Is size a chemical property? Any such characteristic of a material that […]

Is the phosphorus cycle fast? Phosphorus moves slowly from deposits on land and in sediments, to living organisms, and than much more slowly back into the soil and water sediment. The phosphorus cycle is the slowest one of the matter cycles that are described here. How does the phosphorus cycle start? Phosphorus moves in a […]

What are 5 examples of delegated powers? Some examples of powers delegated to the federal government include declaring war, entering treaties, coining money, levying taxes, establishing import duties and tariffs, raising and maintaining the armed forces, and regulating commerce. What are 3 types of delegated powers? There are three distinct types of delegated powers: expressed, […]

Are cameras more accurate than mirrors? A mirror image is called a mirror image because it reverses things from left to right. You usually see a mirror image of yourself. In contrast, if you look at a normal camera photo, you see yourself as another person would see you. Mirrors are much more accurate than […]

How is the first day of winter decided? In the United States and the rest of the northern hemisphere, the first day of the winter season is the day of the year when the Sun is farthest south (on December 21st or 22nd). This day is known as the Winter Solstice. The declination of the […]

What affects the EMF of an electrochemical cell? Electrochemical cells are different from normal reactions; however the amount of volts produced by the cell will be effected by the factors that affect chemical reaction rates. The main factors that affect chemical reactions are Temperature, Surface area and Concentration. How do you calculate cell EMF? Sample […]

Why is US East Coast colder than West? Land has a lower heat capacity than oceans, and it also heats and cools faster than oceans. During the winter, land is much colder than the oceans. When the westerly winds blow over it, the air cools substantially. Thus, the East Coast experiences extreme cold weather during […]