How do you calculate wavelength with frequency and speed of light? The relationship between the frequency (the number of wave crests that pass by a certain point in a given amount of time) and wavelength for electromagnetic waves is defined by the formula, c = λ f, where c is the speed of light, λ […]

Which answer below correctly identifies the type of change and the explanation for the heating of copper sulfate pentahydrate? Which answer below correctly identifies the type of change for heating copper of sulfate pentahydrate? Chemical change because gas formation observe along with a color change, which indicated that the copper sulfate pentahydrate was transformed into […]

What is the oxidation state of manganese? manganese has more than any other. In its compounds manganese exhibits oxidation states from +2 to +7. The common oxidation states are +2, +4, and +7, but the less common +3, +5, and +6 states are easily prepared. What is the oxidation state of manganese in the compound […]

Do you get nightmares when you sleep on your back? Sleeping on your side is the most common sleeping position. Studies have shown that right-side sleepers experienced more positive dreams. Studies show that sleeping on your back can cause more nightmares, and it is also harder to remember your dreams. Stomach sleepers seem to have […]

Is Group 7A reactive? Group 7A — The Halogens. The halogens are extremely reactive (especially fluorine), and are not found naturally in their elemental forms. They are usually found in combination with various metals in minerals, or in combination with other nonmetals in molecular compounds. Why are halogens Group 7A so reactive? The halogens are […]

What do architects use to make models? Balsa wood is a common material used for model construction. It is easy to cut, available in a variety of weights, and relatively cheap to purchase. Basswood is another type of material used often in model making, and is great for carving and other wood crafts. Foam. Why […]

Why does your hair stand on end when you touch a charged Van de Graaff generator? When the Van de Graaff generator starts charging, it transfers the charge to the person who is touching it. Since the person’s hair follicles are getting charged to the same potential, they try to repel each other. This is […]

What should you do if you are exposed to potentially infectious materials? Wash exposed skin, cuts, and needlestick injuries thoroughly with soap and water. If you have been splashed by potentially infectious fluids around the eyes, nose or mouth, flush the area with water. Immediately report the incident to emergency medical services. What should you […]

Why are LED lights more energy efficient? The more lumens, the brighter the light. The LED bulbs require much less wattage than the CFL or Incandescent light bulbs, which is why LED bulbs are more energy-efficient and long lasting than the other types of bulb. Why is the LED bulb more energy efficient than incandescent […]

When there is no heat exchange between two bodies that are at the same temperature they are said to be in? Two bodies are said to be in thermal equilibrium, when no heat is exchanged between then, this is possible only if they both are of the same temperature, because a difference in temperature will […]