Category: Physics

Which gas is filled in fluorescent tube? mercury vapour Is used in electrical bulb? Tungsten is used for making filament of an electric bulb due to the following reasons: Being an alloy it has a very high melting point. It has very high resistivity so it does not burn easily at room temperature. The lamp […]

Is it OK to microwave water for tea? That’s right: Research shows that zapping your favorite tea bag and a cup of water together in the microwave is the most effective way to garner the bevy of tea’s benefits, and get the best taste. How long do you microwave water to boil? Cook Better with […]

What is the minimum condition for diffraction? Condition for diffraction minima: Angle of diffraction θ ≈ nλ/a where n = ±1, ±2, ±3……. where λ is wavelength of light used and a is slit width. What happens to diffraction as wavelength increases? In contrast, diffraction occurs when light bends in the same medium. From either […]

Is money an interval or ratio? Money is measured on a ratio scale because, in addition to having the properties of an interval scale, it has a true zero point: if you have zero money, this implies the absence of money. Is age an interval or ratio? A ratio scale has the first characteristic of […]

Should my pressure cooker hiss? When pressure builds to high safety valves open just enough to release excess pressure which results in a hissing sound and a rattle of the wobbler on the lid. In most cases electric pressure cookers are the quietest because they can regulate pressure more efficiently but even a little hiss […]

Where do you find hazard symbols? They are included on the packaging of substances to guide you as to the type of hazard it is. These COSHH symbols give you a good indication of the main dangers and risks associated with the substance. What does a blue safety sign mean? mandatory signs What does the […]

Where does 80 to 90 of beach sand come from? River sediments are the source of 80 to 90 per cent of beach sand; some beaches are built to great widths by sediments washed to the sea by episodic floods, gradually eroding until the next major flood replenishes the sand. Coastlines are constantly changing due […]

What is P in Minkowski distance? The case where p = 1 is equivalent to the Manhattan distance and the case where p = 2 is equivalent to the Euclidean distance. Although p can be any real value, it is typically set to a value between 1 and 2. Is Hamming distance a metric? For […]

What is a wise woman? n. 1. A woman who is venerated for experience, judgment, and wisdom. 2. A woman who practices traditional arts or folkways such as herbal medicine, midwifery, or divination. Is it better to be wise or intelligent? A good friend of mind once said that it’s easier for a wise person […]

What is the best type of insulation? Closed cell foam has the highest R-value of any insulation, around R-6.2 per inch, but can be expensive; open-cell foam insulation values are around R-3.7 per inch of thickness. Is cloth a good insulator? Results: Fabrics like wool and fleece are great insulators and will keep your body […]