A 15 cm x 15 cm circuit board dissipating 20 W of power uniformly is cooled by air, which approaches the circuit board at 20°C w
ith a velocity of 6 m/s. Disregarding any heat transfer from the back surface of the board, determine the surface temperature of the electronic components (a) at the leading edge and (b) at the end of the board. Assume the flow to be turbulent since the electronic components are expected to act as turbulators.
1 answer:
You might be interested in
Answer:
Detailed step wise solution is given below:
Answer:
- C. 1/4"
- B. 3/16"
Explanation:
1. For hex bolts, lag bolts, and square bolts, the wrench size is 1/4" larger than the bolt size for 1/2" and 9/16" bolts. For 5/8" bolts and larger, the wrench size is <em>50% larger than the bolt size</em>.
__
2. For 7/16" bolts, the wrench size is 5/8", so is 3/16" larger than the bolt. This holds down to 1/4" bolts, where the wrench size may be 3/8" or 7/16".
