What is the focal length of concavo-convex lens? The focal length of a concave-convex lens of radii of curvature 5 cm and 10 cm is 20 cm. Why power of convex lens is positive? Answer. The power of a convex lens is positive as a convex lens has a positive focal length, while the power […]
Is a merry-go-round and a carousel the same thing?
Is a merry-go-round and a carousel the same thing? Merry-go-round or carousel? “Merry-go-round” and “carousel” are synonyms (words that mean the same thing). Whatever the reason, merry-go-rounds in Europe tend to turn clockwise. The ones in North America tend to turn counter-clockwise. What is Carousel mean in English? 1 : a tournament or exhibition in […]
What is the most slippery metal?
What is the most slippery metal? In fact, the low static coefficient of fric- tion of Teflon-on-Teflon, 0.04, made it the most slippery solid substance on earth. Further experimentation revealed the reasons for these properties: the carbon backbone of the polymer chain was com- pletely surrounded by fluorine atoms. Why is friction less on snow […]
Can airbags kill you?
Can airbags kill you? Not only can the airbag can seriously injure you, it can kill you. Second and third generation airbags, even though, they have been de-powered from the mid 1990’s, still deploy outward at 300 mph. A deploying airbag has the explosive equivalent of 20 shotgun shells. This can cause neck fractures and […]
What are the three types of accumulators?
What are the three types of accumulators? Depending on separating elements, we can distinguish three types of hydraulic accumulators: bladder accumulators, diaphragm accumulators, and piston accumulators. What is the purpose of accumulator? Accumulator is a pressure vessel for storing hydraulic pressure in it utilizing compressible and decompressible nature of nitrogen gas. So, it can be […]
How does friction affect total mechanical energy?
How does friction affect total mechanical energy? Mechanical energy is reduced due to friction and converted to heat. This is the reason why there is an increase in temperature in objects that move against each other. The role of friction in a closed system is to convert a part of the total energy to heat. […]
Cuales son las 3 leyes de los gases?
¿Cuáles son las 3 leyes de los gases? Los gases perfectos obedecen a tres leyes bastante simples, que son la Ley de Boyle, la ley de Gay-Lussac y la Ley de Charles. Estas leyes son formuladas según el comportamiento de tres grandezas que describen las propiedades de los gases: volumen, presión y temperatura absoluta. ¿Qué […]
How far does the tip of the minute hand of a clock move in 20 minutes if the hand is 5 inches long?
What is the amount of matter called?
What is the amount of matter called? Mass is a measure of the amount of matter in a substance or an object. What gives us mass? The strong force and you The Higgs field gives mass to fundamental particles—the electrons, quarks and other building blocks that cannot be broken into smaller parts. The energy of […]