Category: Physics

Which lens has the shortest focal length? The shortest focal length, or “ultra wide-angle”lenses, range from 14mm to 20mm, and are followed by “wide-angle” lenses from 24mm to 35mm, and then “standard” lenses from 45 to 70mm, which are similar to the field of view of the human eye. Why is 35mm so popular? This […]

Can we use tungsten as heating coil? Tungsten heating elements are used in a hydrogen atmosphere, especially for high-temperature applications in the range of 1,600°C to 2,000°C because the melting point of tungsten is 3,400°C. Like tungsten, it is used for heating elements in a reducing atmosphere for high-temperature applications. What advantages of Nichrome are […]

What is the importance of electrical conductivity? The reason that the conductivity of water is important is because it can tell you how much dissolved substances, chemicals, and minerals are present in the water. Higher amounts of these impurities will lead to a higher conductivity. Does PH affect conductivity? The more acidic or basic a […]

Is distilled water an element or compound? Distilled water is water that has many of its impurities removed through distillation. Distillation is boiling of water and condensing the steam to water. It is pure form of water so it is a compound. Why are soft drinks bad? Drinking high amounts of sugar-sweetened beverages — such […]

Can a lawyer stop deportation? Cancellation Of Removal And 212(C) Waivers That means you could ask the court for relief from deportation proceedings and to allow you to keep your green card. With your attorney’s help, you must also prove that you deserve to win your case and hang on to your green card. Can […]

Is an Oreo a sandwich? Oreo (/ˈɔːrioʊ/) is an American sandwich cookie consisting of two (usually chocolate) wafers with a sweet crème filling. Introduced on March 6, 1912, Oreo is the best-selling cookie brand in the United States. Is pizza a sandwich or a pie? “It’s a long and convoluted and counter-intuitive argument, but ultimately […]

What is calm wind in aviation? Wind “CALM” means a wind speed less than 0.5m/s (1 kt) according to ICAO Annex 3, Appendix 3: 4.1. d) when a wind speed of less than 2 km/h (1 kt) is reported, it shall be indicated as calm; See also Annex 3: Appendix 5, recommendation 1.2. What wind […]

How long do spent nuclear fuel rods need to be cooled? These fuel rods have to be cooled for anywhere between five to 10 years before they’re safe enough to be taken out of these pools and put into dry cast storage. Until they are safe enough for that, they need constant attention. What happens […]

What happens if 2 Live wires touch? Connecting two live wires in such a way to the switch will do nothing if both live wires are from the same source, as no current will flow as they should both possess the same potential measured in volts ( An electrical current flows between points of different […]

Why electric field is from positive to negative? The direction of the electric field is always directed in the direction that a positive test charge would be pushed or pulled if placed in the space surrounding the source charge. As such, the lines are directed away from positively charged source charges and toward negatively charged […]