Category: Physics

What is the change of state when wax melts? Melting of wax, by itself, involves a change of state from solid to liquid. When the physical state of a substance changes, no new products are formed. Hence, it is a physical change. What state was the wax in before it was heated? solid What will […]

What are the 3 types of wells? There are three types of private drinking water wells. Dug/Bored wells are holes in the ground dug by shovel or backhoe. Driven wells are constructed by driving pipe into the ground. Drilled wells are constructed by percussion or rotary-drilling machines. Does rain fill your well? While your well […]

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 the difference between force and energy? A force is any action that tends to alter the state of rest or uniform motion motion of a body. This is essentially Newton’s first Law of motion. Energy is a property of an system that is a measure of the capacity to do work. for example […]

What are the odds of getting West Nile? The odds of getting the most severe forms of West Nile disease are about one in 150. What are the long term side effects of West Nile virus? The most common long-term effects are depression, tremors, fatigue, memory problems, extremity weakness, word-finding difficulty and headaches. Since WNV […]

What are the limitations of valence bond theory? Limitations of Valence Bond Theory The theory assumes that electrons are localized in specific areas. It does not give a quantitative interpretation of the thermodynamic or kinetic stabilities of coordination compounds. No distinction between weak and strong ligands. Why MOT is preferred over VBT? molecular orbital theory […]

Is the Court of International Trade a federal court? The United States Court of International Trade is an Article III federal court. The Customs Court Act of 1980 replaced the former United States Customs Court with the United States Court of International Trade. The chief judge of the court is Timothy Stanceu, who was appointed […]

Which statement best describes what occurs during a chemical reaction? During a chemical reaction both the identity and the properties of a substance change. Chemical reaction between two substances occurs to form a new substance which is completely different. Therefore, it has different appearance and physical state as well as the chemical properties. Which statement […]

Is it bad to be in peak heart rate zone? Going higher than your maximum heart rate for long periods of time could be dangerous for your health. That’s especially true if you’re new to exercise. Do you burn fat in peak heart rate zone? The ‘fat burning zone’ is where you are working out […]

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 […]