What is the law of vector algebra? Vector algebra in geometric form Two vectors u and v are equal if they have the same magnitude (length) and direction. The Negative of a Vector The negative of the vector u is written -u, and has the same magnitude but opposite direction to u. If u = […]
How many properties do ionic compounds have?
How many properties do ionic compounds have? Properties of Ionic Compounds Ionic Compounds have high boiling and melting points as they’re very strong and require a lot of energy to break. The electrostatic forces of attraction between oppositely charged ions lead to the formation of ions. Ionic compounds form crystals. Is sugar a covalent or […]
What makes the Rhine River so important?
What makes the Rhine River so important? The Rhine is western Europe’s most important waterway. It rises in the Alps, and passes through Switzerland, France, Germany and the Netherlands before flowing into the North sea. The river is 1,320 kilometres long, and, because it is navigable from Basel to Rotterdam, it serves as a highway […]
Which of the following is a reason photographing animals can be difficult?
Which of the following is a reason photographing animals can be difficult? Answer: They are objects that are not within the control of the photographer so they can move quickly or spontaneously which make get a good and quality shot difficult. What is true about posed portraits? They look more natural. They tend to have […]
What would you select as the most important characteristics of a society?
What would you select as the most important characteristics of a society? The political, financial and social aspects of a society are certainly important. But one cannot ignore the other important facets namely tradition, history and culture. Most major cities are cosmopolitan in nature, that is, they have people of different societies living together. What […]
What is the ideal temperature for water?
What is the ideal temperature for water? If we’re just going about our day to day routines, cold water is best. Water between 50 and 72 degrees allows our bodies to rehydrate faster because it is absorbed more quickly. Many people think that drinking cold water will help them lose weight faster because the body […]
What are the colors that have high energy?
What are the colors that have high energy? The visible light portion of the electromagnetic spectrum shows the rainbow of colors, with violet and blue having shorter wavelengths, and therefore higher energy. At the other end of the spectrum toward red, the wavelengths are longer and have lower energy (Figure 3). Is red a higher […]
What are examples of capital resources for kids?
What are examples of capital resources for kids? Capital resources are goods produced and used to make other goods and services. Examples of capital resources are an office building, office copying machine, pots and pans and a wrench. Ask the students for other examples of capital resources. What is the most important resources of production? […]
Does bleach remove food coloring from water?
Does bleach remove food coloring from water? A small amount of bleach delivered with an eye dropper will change the color of colored water, making the color seem to disappear before your students’ eyes. Fill one beaker with water and another with a little bit of liquid bleach. Don’t fill the bleach beaker too much, […]
Which is the best example of a point source pollution?
Which is the best example of a point source pollution? Examples of point sources include sewage treatment plants; oil refineries; paper and pulp mills; chemical, automobile, and electronics manufacturers; and factories. Regulated pollutants from point sources include wastes, soils, rocks, chemicals, bacteria, suspended solids, heavy metals, pesticides, and more. What are 4 possible sources of […]