Compared to red muscles, white muscles:
a. Have greater blood flow c. Contain fewer mitochondria
b. Contract more slowly d. Have a higher myoglobin content
C
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Explain what happens when standoff distance increases.
What will be an ideal response?
A heating cable is embedded in a concrete slab to melt snow on a 5-m × 5-m surface area. The heating cable is heated electrically with joule heating. The concrete has a thermal conductivity of 1.4 W/m•K, and the layer between the slab surface and the heater surface is 50 mm. When the surface is covered with snow, the heat generated from the heating cable can melt snow at a rate of 0.1 kg/s. According to the National Electrical Code (NFPA 70), the power density (heat flux) for embedded snow-melting equipment should not exceed 1300 W/m2. Under the given conditions, does the concrete slab with the embedded heating cable operate in compliance with the NFPA 70 code? Also, to minimize thermal stress in the concrete, the temperature difference between the heater surface (T1) and the slab
surface (T2) should not exceed 21°C (2015 ASHRAE Handbook—HVAC Applications, Chap. 51). Do the current operating conditions allow T1 ? T2 ? 21°C?
What will be an ideal response?
The greatest cost management consideration of annual cow costs is feed costs.
Answer the following statement true (T) or false (F)
As OTA bias current increases
A) output resistance decreases B) input resistance decreases C) input resistance increases D) both a and c