Answer:
The large percentage of steel includes less than 0.35% carbon
Explanation:
Carbon is perhaps the most important business alloy of steel. Raising carbon material boosts strength and hardness and enhances toughness. However, carbon often increases brittleness.
The large percentage of steel includes less than 0.35% carbon. Any steel with a carbon content range of 0.35% to 1.86% can be considered as hardened.
Answer:
Optimal aspect ratio = 1
Explanation:
From Chvorinov's Rule,
![T = c [\frac{volume}{surface are}]^n](https://tex.z-dn.net/?f=%20T%20%3D%20c%20%5B%5Cfrac%7Bvolume%7D%7Bsurface%20are%7D%5D%5En%20)
Where
T = solidification time
c = mold constant
For the riser to have the longest solidification time:
We have: D = h
![A = pi Dh[\frac{2pi D^2}{4}] = 1.5D^2 pi](https://tex.z-dn.net/?f=%20A%20%3D%20pi%20Dh%5B%5Cfrac%7B2pi%20D%5E2%7D%7B4%7D%5D%20%3D%201.5D%5E2%20pi)
Therefore,
To have to longest solidification time, D = h
Therefore the best aspect ratio would be,
False as there are many risk in driving
Answer:
Explanation:
1) Resolution and uncertainty of both ADC ranges
a) Resolution (for +/- 5 mV range) = 5 mV / 2n where n = number of bits of ADC
Resolution = 5 mV / 28 = 5 mV / 256 = 0.0195 mV ..................1
uncertainty (for +/- 5 mV range) = +/- 0.5*resolution = +/- 0.5*0.0195 mV = 0.00975 mV ..........2
b) Resolution (for +/- 5 V range) = 5 V / 2n where n = number of bits of ADC
Resolution = 5 mV / 28 = 5 V / 256 = 0.0195 V = 19.5 mV ..................3
uncertainty (for +/- 5 mV range) = +/- 0.5*resolution = +/- 0.5*19.5 mV = 9.75 mV ..........4
2)Thermocouple sensitivity = ( Maximum output voltage - Minimum Output voltage) / (Maximum Temperature - Minimum Temperature)
Thermocouple sensitivity = (3.649mv - 0 ) / (70 - 0) = 0.0521 mV / Deg.C ............5
This is the required Thermocouple sensitivity
3) Water bath temperature is given as 57 deg.C
Hence voltage read by Thermocouple = Sensitivity*57 = 0.0521*57 mV = 2.9697 mV ........6
4)We need to use ADC with a range of +/- 5 mV range as ADC with +/- 5 V range can not do measurement as it's resolution is higher than output voltage.
ADC will measure voltage as 2.9695 mV ......................7
