Alocomotive is pulling 8 freight cars, each of which is loaded with the same amount of weight. the mass of each freight car (with its load) is 37,000 kg. if the train is accelerating at 0.48 m/s2 on a level track, what is the tension in the coupling between the second and third cars? (the car nearest the locomotive is counted as the first car, and friction is negligible.)

Which type of basaltic lava flow has a fairly smooth

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.

What practical value did astronomy offer to ancient civilizations?