Category: Physics

Why is there no change in temperature during a phase change? The term change of phase means the same thing as the term change of state. i.e. during phase change, the energy supplied is used only to separate the molecules ; no part of it is used to increase the kinetic energy of the molecules. […]

Is ice made of H2O? Ice is H2O. c. Water vapor is H2O Adam Sennet has no problem with this. Water is a liquid. Can you have water vapor at 0 C? Yes, water can stay liquid below zero degrees Celsius. There are a few ways in which this can happen. The freezing point of […]

What is the largest group of rock-forming minerals? Silicates What are the two main group of minerals? All minerals, however, can be classified into two main groups—silicate minerals and nonsilicate minerals—based on the chemical compositions of the minerals. What are the 7 mineral groups? Silicates, oxides, sulfates, sulfides, carbonates, native elements, and halides are all […]

Is it worth it to buy a telescope? Most telescopes that cost less than $300 aren’t really worth it. We suggest getting good binoculars instead. Stay away from any telescope advertised for its magnifying power. For a child, look for a tabletop telescope that’s portable, easy to push around the sky, and virtually indestructible. What […]

What are the only two rivers in the world that flow north? Johns River and the Nile River are the only two rivers in the world that flow north.” In this editorial he explains that there are hundreds of rivers that flow north and; in fact, the St. Johns River flows south as well. What […]

What are two ways to determine energy expenditure? Energy expenditure can be estimated by measuring macronutrient or oxygen consumption, or heat production or carbon dioxide production. Most measurement approaches in use today involve the measurement of oxygen consumption and/or production of carbon dioxide via indirect calorimetry. What are the components of energy expenditure? Total energy […]

Why do players use leather gloves when playing baseball? A baseball glove or mitt is a large leather glove worn by baseball players of the defending team, which assists players in catching and fielding balls hit by a batter or thrown by a teammate. Why do baseball players leave index finger out? Infielders who keep […]

Can you breathe oxygen 17? Oxygen 17 is an isotope of oxygen. Oxygen-17 exists in nature as well and its possible you are currently breathing it and you do drink it ! Oxygen 17 is rare stable isotope of oxygen. It is having eight protons and nine neutrons; it amounts to 0.037% of the element […]

What are the 3 most common bodily fluids analyzed in toxicology? Blood and urine are commonly encountered, but oral fluid, hair, and other specimens are also used. Forensic toxicologists are frequently asked to determine the timing and extent of impairment resulting from different patterns of drug and alcohol use. What is the most common type […]

Are ionic structures strong? Ionic compounds have regular structures, called giant ionic lattices . In a giant ionic lattice, there are strong electrostatic forces of attraction acting in all directions between the oppositely charged ions. The structure and bonding of ionic compounds explain their properties . Why do giant ionic structures dissolve in water? To […]