Category: Physics

What is ionized helium? Singly ionized helium is an atom that has lost one of its electrons. We must expect its remaining electron to act like a hydrogen electron. There is only one difference between a hydrogen atom and a singly ionized helium atom; number of protons in the nucleus, so the nuclear charge. What […]

How can I check my oxygen level at home iPhone? On your iPhone, open the Health app. Follow the onscreen steps. If you don’t see a prompt to set up, tap the Browse tab, then tap Respiratory > Blood Oxygen > Set up Blood Oxygen. After you complete setup, open the Blood Oxygen app on […]

Can a person live without bone marrow? It is the blood cell ‘factory’. Healthy bone marrow releases blood cells into the bloodstream when they are mature and when required. Without bone marrow, our bodies could not produce the white cells we need to fight infection, the red blood cells we need to carry oxygen, and […]

What is the critical approach to technology? Drawing inspiration from Marx’s approach, critical theory of technology argues that technology is both rational and biased. The design, development and eventual implementation of a technology are seen as normative processes through which interests and values are delegated to technological devices and systems. Does technology determine society? Technological […]

Why is chemical change not easily reversible? chemical change never reversed because it produce new substance after reaction which is not reversible . if it is reversed , it can’t called chemical reaction , it called physical reaction. Is a chemical change reversible? In principle, all chemical reactions are reversible reactions . This means that […]

How do rocks and soil move downslope? Mass wasting – is movement in which bed rock, rock debris, or soil moves downslope in bulk, or as a mass, because of the pull of gravity. Landslides is a general term for the slow-to-very rapid descent of rock or soil. Flow – The debris is moving downslope […]

Why do we use 8.314 as the value for R? R = 8.314 is actually the more important value because it is expressed in SI units (note that 1 J = 1 Pa * m^3= 1 N/m^2 * m^3 = 1 N * m). What does R mean in chemistry? R group: An abbreviation for […]

How do rockets rotate? In flight, any rocket will rotate about its center of gravity, a point which is the average location of the mass of the rocket. Most rockets are symmetric about a line from the tip of the nose to the center of the nozzle exit. We will call this line the roll […]

Why do bats die near wind turbines? When a wind turbine’s blades move, they cause a drop in nearby air pressure. If a bat flies too close to a turbine, this drop in air pressure can damage its lungs. They found that each wind turbine kills around 5 birds and 12 bats every year! How […]

Does the atomic radius increase from left to right? Atomic radius is determined as the distance between the nuclei of two identical atoms bonded together. The atomic radius of atoms generally decreases from left to right across a period. The atomic radius of atoms generally increases from top to bottom within a group. What is […]