What is the change in the internal energy, in btu/lbm, of air as its temperature changes from 100 to 200°f? is there any difference if the temperature were to change from 0 to 100°f? the constant-volume specific heat of air at room temperature is cv = 0.171 btu/lbm·r. consider the variation of specific heat with temperature. cv = 0.1725 btu/lbm·r at 150°f and cv = 0.1712 btu/lbm·r at 50°f.

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.

In which of the following can you not find plasma

What are high points of a transverse wave