What is meant by a free electron? 1 : an electron within a conducting substance (as a metal) but not permanently attached to any atom. 2 : an electron moving in a vacuum. Who proposed free electron model? Hendrik A. What are the types of free electron theory? Classical free electron theory of metals (Drude […]
What is the function of the dermis?
What is the function of the dermis? The dermis is a fibrous structure composed of collagen, elastic tissue, and other extracellular components that includes vasculature, nerve endings, hair follicles, and glands. The role of the dermis is to support and protect the skin and deeper layers, assist in thermoregulation, and aid in sensation. What are […]
How might predator/prey relationships affect light pollution?
How might predator/prey relationships affect light pollution? Summary: A new study provides strong evidence that exposure to light pollution alters predator-prey dynamics between mule deer and cougars across the intermountain West, a rapidly growing region where nighttime skyglow is an increasing environmental disturbance. When the environment has reached its carrying capacity for the human population […]
What is it called when you replicate a study?
What is it called when you replicate a study? Replication is a term referring to the repetition of a research study, generally with different situations and different subjects, to determine if the basic findings of the original study can be applied to other participants and circumstances. What are the two types of replication psychology? At […]
How does a catalyst decrease activation energy?
How does a catalyst decrease activation energy? A catalyst can lower the activation energy for a reaction by: orienting the reacting particles in such a way that successful collisions are more likely. reacting with the reactants to form an intermediate that requires lower energy to form the product. What is difference between positive and negative […]
What is the least common form of residence Pattern?
What is an experimental control example?
What is an experimental control example? Experimental controls are used in scientific experiments to prevent factors other than those being studied from affecting the outcome. For example, suppose a researcher feeds an experimental artificial sweetener to thirty laboratory rats and observes that eight of them subsequently die of dehydration. Why is it important to have […]
Is energy released in alpha decay?
Is energy released in alpha decay? The energy released in this α decay is in the MeV range, about 106 times as great as typical chemical reaction energies, consistent with many previous discussions. Most of this energy becomes kinetic energy of the α particle (or 4He nucleus), which moves away at high speed. Is energy […]
Do electrons move in their orbitals?
Do electrons move in their orbitals? Because an electron is a quantum object with wave-like properties, it must always be vibrating at some frequency. Furthermore, an electron in a stable atomic state does not move in the sense of waving through space. The orbital electron does move in the sense of vibrating in time. Can […]
Is the Ferber method cruel?
Is the Ferber method cruel? The Ferber method is not appropriate as a treatment for most child sleep problems. When parents consider sleep training, it’s usually because their children are experiencing bedtime problems and/or disruptive night wakings. How do I teach my baby to self soothe? Master the timing. Create a bedtime routine. Offer a […]