A 2 cm diameter glass rd (k = 0.8 W/mK) is 6 cm long. It has base temperature at 120ÂșC and is exposed to air at 20ÂșC. The temperature at the tip of the rod is measured as 35ÂșC. What is the convection heat transfer coefficient? How much heat is lost by the rod?
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A satellite is launched from earth such that the booster burnout occurs at an altitude of 500km with a speed of 9.6km/s at an angle from the perpendicular from the orbit radius of ÎČ=15 degrees. Determine: a) the total orbit angular momentum per unit mass b) the total orbit energy per unit mass c) the orbital eccentricity e d) the maximum and minimum altitude, e) the maximum and minimum speed, f) the true anomalies ï± at booster burnout, minimum and maximum speeds, g) Is the orbit sustainable â explain. As the satellite passes apogee its rocket is fired to circularise the orbit. However the resultant speed was +4% off and ÎČ=2 degrees after the rocket is fired. h) If the satellite loses 20% of its 1tonne mass during rocket firing, how much does the firing change the orbit energy in J, i) What is the resultant orbit eccentricity.
