When was the first car made in America?

When was the first car made in America? 1893 Who made the 1st car? On January 29, 1886, Carl Benz applied for a patent for his “vehicle powered by a gas engine.” The patent – number 37435 – may be regarded as the birth certificate of the automobile. In July 1886 the newspapers reported on […]

What is a hot wire anemometer used for?

What is a hot wire anemometer used for? A hot-wire anemometer is a thermal transducer which has been widely used to measure instantaneous flow velocity. The use of the hot-wire anemometer permits instantaneous flow velocity to be calculated from electric voltage measurements. Which of the following can be measured by a hot wire anemometer? Explanation: […]

Which of the following power generation technologies produces a direct current?

Which of the following power generation technologies produces a direct current? Among these four choices, solar cells are the only power generation technology that produces a direct current. How thermal energy is produced by solar energy? Solar thermal power/electric generation systems collect and concentrate sunlight to produce the high temperature heat needed to generate electricity. […]

Does cold work decrease grain size?

Does cold work decrease grain size? The cold-worked structure forms high dislocation density regions that soon develop into networks. The grain size decreases with strain at low deformation but soon reaches a fixed size. Cold working will decrease ductility. Which of the following statements is true about cold working? 6. The working temperature of cold […]

How is channel capacity calculated?

How is channel capacity calculated? According to channel capacity equation, C = B log(1 + S/N), C-capacity, B-bandwidth of channel, S-signal power, N-noise power, when B -> infinity (read B ‘tends to’ infinity), capacity saturates to 1.44S/N. How is SNR calculated? So, if your SNR measurements are already in decibel form, then you can subtract […]

What type of bonding occurs in polymers?

What type of bonding occurs in polymers? covalent bonds How does the structure of a polymer affect its properties? Polymers consist of very long molecules that contain chains of carbon. They too are held together by very strong covalent bonds. There are greater intermolecular forces between the long chains compared with smaller simple molecules. This […]

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