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Physics, 22.06.2019 15:10
An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?
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Physics, 23.06.2019 23:00
Which image illustrates why dark clothing to keep you warm on a cool, sunny day?
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Physics, 24.06.2019 04:00
Multiple unit electric train has 800 tonnes mass,the resistance to motion is 100 newton's tonnes of the train if the electric motor can provide 200kn tractive force,how long will it take to accelerate the train to a speed of 90km/hr from rest
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