Consider a thin circular disk that has been heated up to 100 °c and then left inside a chamber to cool down. the chamber surface is kept at 50 °c and the air inside is maintained at 20 °c. assume that the disk is held at the center of the chamber and the heat conduction is neglectable. what is the total rate of heat transfer from the disk? the disk diameter is 500 mm and the surface emissivity is ε = 0.5. note: air properties: υ = 20.92×10-6 m2 /s, k = 30×10-3 w/mk, pr = 0.7, α = 29.9×10-6 m2 /s and

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !

What are some important factors to consider when choosing a warm-up before your workout?

Which sections of the heating curve illustrate this process?