Category: Physics

Is human eye better than camera? Most current digital cameras have 5-20 megapixels, which is often cited as falling far short of our own visual system. This is based on the fact that at 20/20 vision, the human eye is able to resolve the equivalent of a 52 megapixel camera (assuming a 60° angle of […]

Which of the following relations is correct for permeability? The correct relation between magnetic susceptibility and relative permeability is- 1 x = Ur-1 2 x = 4r + 1 3 x = u + 1 4 x = u – 1. What is relationship between μ and ɸ *? There is an inverse relationship between […]

How do I know if a temp table exists? OBJECT_ID function can take the object’s name as a parameter so we can use this function to check the existence of any object in the particular database. The following query will check the #LocalCustomer table existence in the tempdb database, and if it exists, it will […]

How do you find the buoyant force of a balloon? Buoyant Force of Balloons The formula for buoyant force is: (B) = ρ V g. ρ = Density of Fluid (We used density of the air because the balloons were afloat, not submerged) V = Displaced Volume. g = 9.8 (gravity) Density of air(ρ)= 1.225 […]

Is it safe to run a dehumidifier constantly all the time? No, it is not necessary to run your dehumidifier all the time. You should only run your unit when the humidity level is above 50 percent. Collecting water constantly with a dehumidifier does really help you maintain the temperature and relative humidity at an […]

What is a rich sound? Generally I would define “rich” bass as having a fairly flat frequency curve, which means all the finer details across the bass frequencies aren’t obscured by a nasty peak(s). So rather than having what’s known as “one note bass”, you have a smooth and detailed sound in which you can […]

Is it bad to always park on a hill? Answer: Any time you park a car with an automatic transmission on a steep hill or incline, you are running a risk of transmission damage if you don’t exercise a lot of care. The problem can be avoided by setting your parking brake on steep hills […]

What is the difference between structural and ball and stick model? A molecular formula uses chemical symbols and subscripts to indicate the exact numbers of different atoms in a molecule or compound. A structural formula indicates the bonding arrangement of the atoms in the molecule. Ball-and-stick and space-filling models show the geometric arrangement of atoms […]

What are chemical properties of steel? Alloy Steel Alloy steels (like carbon steels) contain both carbon and iron, but add additional elements such as silicon, nickel, chromium, manganese, or vanadium. The extra elements added are what provide the additional features and varied chemical properties compared to carbon steels. Is gold a metal? Gold (Au), chemical […]

Why hydrogen ion does not exist? Because the bare nucleus can readily combine with other particles (electrons, atoms, and molecules), the isolated hydrogen ion can exist only in a nearly particle-free space (high vacuum) and in the gaseous state. Why are H+ ions? Loss of an electron from H atom results in H+ . ion […]