Consider the following statement, and explain whether or not it is sensible: When I looked into the dark fissure of the Milky Way with my binoculars, I saw what must have been a cluster of distant galaxies
What will be an ideal response?
This statement does not make sense because we cannot see through the band of light we call the Milky Way to external galaxies; the dark fissure is gas and dust blocking our view.
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A steam pipe 200-mm in diameter passes through a large basement room. The temperature of the pipe wall is 500°C, while that of the ambient air in the room is 20°C. Determine the heat transfer rate by convection and radiation per unit length of steam pipe if the emissivity of the pipe surface is 0.8 and the natural convection heat transfer coefficient has been determined to be 10 W/(m2 K).
GIVEN
FIND
- Heat transfer rate by convection and radiation per unit length of the steam pipe (q/L)
ASSUMPTIONS
- Steady state prevails
- The walls of the room are at the same temperature as the air in the room
- 
ASSUMPTIONS
- Steady state prevails
- The walls of the room are at the same temperature as the air in the room
- 
SKETCH
Reverberation time of a room can be increased by covering the walls with better reflectors of sound
a. True b. False Indicate whether the statement is true or false
The triple alpha process produces energy by fusing ________ into ________.
A. carbon and nitrogen; cyanogen B. oxygen and carbon; carbon dioxide C. helium; carbon D. oxygen; carbon E. hydrogen; helium
Daytime high temperatures generally occur:
What will be an ideal response?