Prior to the invention of a revolutionary means of travel, people had to make long, dangerous journeys to cross parts of the country. Due to this development, society was revolutionized as travel became safe and efficient. Which is most likely the first invention that changed society so much? A. the airplane B. the steam engine C. the car D. the train

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg. k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m. k