Physics, 27.09.2019 19:20, anglekhan101
The westinghouse air brake, first demonstrated successfully in 1868, had been developed to such an extent by 1887 that a train of 50 freight cars traveling at 20 miles per hour could be brought to a standstill in the space of 171 feet, whereas before they required 5 hand breakers over a distance of 1,500 feet for such a train to be stopped.
(a) whereas before they required 5 hand breakers over a distance of 1,500 feet for such a train to be stopped.(b) whereas previously 5 hand breakers operating over a distance of 1,500 feet had been required to stop such a train.(c) but before stopping the train required 5 hand breakers operating over a distance of 1,500 feet.(d) but previously they required 5 hand breakers over a distance of 1,500 feet stopping the train.(e) but before stopping such a train required 5 hand breakers over a distance of 1,500 feet.
Answers: 1
Physics, 22.06.2019 07:00, divadebbgirl1
Examine the equation. 23490thβ23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a. a piece of paper b. a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block
Answers: 1
The westinghouse air brake, first demonstrated successfully in 1868, had been developed to such an e...
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