Category: Physics

Do trees grow out of the air? But the truth is, trees are actually formed largely out of the air. (Yes, air!) Trees, and all photosynthesizing plants, use the energy of the sun to split atmospheric carbon dioxide into its constituents: oxygen and carbon. And carbon is the primary building block of the tree — […]

How depletion region is formed in pn junction? Movement of electrons to the p-type side exposes positive ion cores in the n-type side while movement of holes to the n-type side exposes negative ion cores in the p-type side, resulting in an electron field at the junction and forming the depletion region. When depletion region […]

What is the difference between heat transfer by conduction and convection? In conduction, heat transfer takes place between objects by direct contact. In convection, the heat transfer takes within the fluid. The heat transfer occurs through a heated solid object. What is the difference between conduction and convection name one medium in? hope this helps. […]

What is angular momentum of a particle? The angular momentum of a rigid object is defined as the product of the moment of inertia and the angular velocity. It is analogous to linear momentum and is subject to the fundamental constraints of the conservation of angular momentum principle if there is no external torque on […]

What does it mean to find the inverse of a function? An inverse function is a function that undoes the action of the another function. A function g is the inverse of a function f if whenever y=f(x) then x=g(y). In other words, applying f and then g is the same thing as doing nothing. […]

What period in the periodic table is iron found in? Fact box Group 8 1538°C, 2800°F, 1811 K Period 4 2861°C, 5182°F, 3134 K Block d 7.87 Atomic number 26 55.845 State at 20°C Solid 56Fe How many types of iron are there? two What are two iron types? Heme iron is found in meat, […]

Is ear popping a good sign? Having clogged ears can be uncomfortable and may muffle your hearing. When this happens, popping your ears may help. Popping your ears is generally safe. It usually requires little more than moving your mouth muscles. Is ear popping a sign of infection? When doctors refer to an ear infection, […]

How does input make an output? How does input make an output? The computer sits between the input and output devices. A computer program processes and digitises the input information. The result is then sent to an output device such as a screen. What is an input-output diagram? Input-output diagrams are the first step in […]

Why are steam engines inefficient? Steam engines are extremely inefficient, wasting around 80–90 percent of all the energy they produce from coal. That means they have to burn enormous amounts of coal to produce useful amounts of power. It’s inefficient because energy is wasted as the heat and steam travel from the fire, via the […]

Does food processing play an important role in your daily living? Food processing can lead to improvements in, or damage to, the nutritional value of foods, sometimes both at the same time, and it can help to preserve nutrients that would otherwise be lost during storage. They play an important role in preserving the freshness, […]