Why some elements are reactive? The number of electrons in the outermost shell of an atom determines its reactivity. Halogens are highly reactive because they readily gain an electron to fill their outermost shell. Alkali metals are highly reactive because they readily lose the single electron in their outermost shell. Is S or O more […]
How do you know if starter motor is bad?
What is the danger of replacing a circuit breaker or fuse with a larger rating?
What is the danger of replacing a circuit breaker or fuse with a larger rating? Since all fit the same socket, there is always the danger of replacing one fuse with a higher amperage than is safe. The higher-rated fuse will allow more current to flow than the wires can safely handle, causing overheating and […]
How do plants benefit from bacteria?
How do plants benefit from bacteria? Source. Bacteria benefit from the plant nutrients provided by the roots, but plants can benefit from their rhizobacteria as well. Bacteria known as Plant Growth-Promoting Rhizobacteria (PGPR) are diverse and represent a wide range of phyla. They also perform a wide variety of growth-promoting functions. What is relationship between […]
What is difference between mean and median?
What does conductivity depend on?
What does conductivity depend on? What does conductivity depend on? It depends on the concentration, mobility, the valence state of the ionized species in a solution, and the temperature at which a measurement is taken. The higher the concentration of the ions in water, the higher the conductivity. How does thermal conductivity depend on density? […]
Is there a measure of sharpness?
Is there a measure of sharpness? There is no unit of sharpness but instruments are available to measure it. Those instruments provide accurate results with high precision. What is the sharpest knife in the world? Obsidian knife blades: overkill for slicing your sandwich. The thinnest blades are three nanometres wide at the edge – 10 […]
What is the most energy efficient plant?
What is the most energy efficient plant? sugar cane Why do plants not absorb all light? Plants and other photosynthetic organisms are largely filled with pigment protein complexes that they produce to absorb sunlight. The pigment in the lowest layer has to receive enough light to recoup its energy costs, which cannot happen if a […]
How do we know the nucleus is positive?
How do we know the nucleus is positive? Rutherford deduced that the atomic nucleus was positively charged because the alpha particles that he fired at the metal foils were positively charged, and like charges repel. In Rutherford’s experiments most of the alpha particles passed straight through the foil without being deflected. Is a nucleus positive? […]
What is a requirement for storing chemicals?
What is a requirement for storing chemicals? Chemicals must be separated when being stored to ensure that incompatible chemicals do not mix if there is a spill. Keep the outside of containers clean and the storage area tidy. Do not store liquids above solids to avoid contamination in the event of a leak. Always store […]