What China gave to the world?

What China gave to the world? Papermaking, printing, gunpowder and the compass – the four great inventions of ancient China-are significant contributions of the Chinese nation to world civilization. China was the first nation to invent paper. What was invented 2000 years ago? Date Invention or discovery Prehistory 2000 BCE Water-raising and irrigation devices like […]

Why does force increase with increasing velocity in eccentric contractions?

Why does force increase with increasing velocity in eccentric contractions? During concentric muscle contraction, the force generated during shortening decreases non-linearly as the shortening velocity increases. Conversely, forced-lengthening of a contracting muscle (i.e. eccentric contraction) at loads that are greater than that of isometric contraction results in a rapid rise in force [1]. What happens […]

Why are custom neon signs so expensive?

Why are custom neon signs so expensive? Cost More than LED Neon Signs: It’s difficult to give an exact cost for your custom neon sign, because it will depend on the size and complexity of your design. Cost More to Run than LED Signs: Neon signs are more expensive to run than LED signs. How […]

Is humidity cold or hot?

Is humidity cold or hot? Humidity is the presence of water molecules in the air. High humidity levels are more likely in warm air, because it can hold more water at higher temperatures. If the air in your home is warm, it will also have the capacity to hold a lot of moisture. Where do […]

What is the angle of reflected ray?

What is the angle of reflected ray? The law of reflection states that the angle of reflection equals the angle of incidence—θr = θi. The angles are measured relative to the perpendicular to the surface at the point where the ray strikes the surface. What is the purpose of angle of incidence? The angle of […]

How many types of electrons are there?

How many types of electrons are there? In the case of a scanning electron microscope (SEM), two types of electrons are typically detected: backscattered electrons (BSEs) and secondary electrons (SEs). What properties do electrons have? Electrons have three fundamental properties: charge, mass, and spin. By definition, the electric charge on an electron is −1. The […]

How long should you take dexamethasone for COVID-19?

How long should you take dexamethasone for COVID-19? WHO advises against the use of corticosteroids in the treatment of patients with non-severe COVID-19, unless the patient is already taking this medication for another condition. Time and duration of medication should be once daily for 7-10 days. What are the typical side effects of dexamethasone during […]

What are three ways heat is transferred?

What are three ways heat is transferred? Heat can be transferred in three ways: by conduction, by convection, and by radiation. Conduction is the transfer of energy from one molecule to another by direct contact. Convection is the movement of heat by a fluid such as water or air. Radiation is the transfer of heat […]

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