What is the difference in blood pressure (mm-Hg) between the top of the head and bottom of the feet of a 1.60-m-tall person standing vertically?
ANSWER:The truck of 20,000 kg is moving at a speed of 25 km/h.So, it’s kinetic energy will be, 2K.E = 1/2×20000 kg×(25 km/h) . = 10000 kg×625 km /hr = 6250000 kg.km /hr 2 2Here we did not convert the units to jules for the reasons which will be clear in a while.If we want our car of 1000 kg will have the same kinetic energy, then the below condition mustbe satisfied. K.E CAR= K.E TRUCK 1/2×1000 kg×V = 6250000 kg.km /hr 2 2 2 2 2 500×V = 6250000 kg.km /hr 2 V = 6250000 / 500 = 12500 V = 12500 V = 111.80 = 112 km/hr approximately.CONCLUSION:So if the car travels at the speed of 112 km/hr, then it will have the same kinetic energy as thetruck.The reason we did not change the units of velocity is, the velocity of the truck was given inkm/hrs. And if we would have converted it into m/s, then again after all these calculations againwe would have to convert it into km/hr .\n