Directions: Use the universal law of gravitation to calculate the acceleration due to gravity on different planets
Planet
Mass
Radius
Force
Acceleration due
experienced by to Gravity
75kg astronaut
Mercury
3.3x1023 kg
2.439x10° Im
Venus
4.87x1024 kg
6.052x10 m
Earth
5.972x1024 kg
6.378x10 m
Mars
6.417x102 kg
3.389x10 m
Jupiter
1.899x1027 kg
6.991x10 m
Saturn
5.685x1026 kg
5.823x10 m
Uranus
8.682x1025 kg
2.536x10m

Asteel tube (k=50 w/mk) of inner and outer diameter di = 20mm and do=26mm, respectively, is used to transfer heat from hot gases flowing over the tube (h-hot = 200w/m2k) to cold water flowing through the tube (h-cold = 8000 w/m2k). what is the cold-side overall heat transfer coefficient uc? to enhance heat transfer 16 straight fins of rectangular profile are installed longitudinally along the outer surface of the tube. the fins are equally spaced around the circumference of the tube, each having a thickness of 2mm and a length of 15mm. what is the corresponding overall heat transfer coefficient uc? *solve for uc in both cases*