E85 means that the fuel is made from ________
A) 85% ethanol, 15% gasoline B) Ethanol that has 15% water
C) 85% gasoline, 15% ethanol D) Pure ethyl alcohol
A
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Air flows at steady state through a horizontal, insulated pipe with inside diameter of 4 cm. A pressure drop results from flow through a partially opened valve. Just upstream from the valve, the pressure is 7 bar, the temperature is 45°C, and the average velocity is 20 
If the pressure just downstream from the valve is 1.3 bar, what is the temperature? Assume for air that PV/T is constant, 
= (5/2)R, and 
= (7/2)R.
What will be an ideal response?
1/2 + 2/3 = ?
What will be an ideal response?
Forestry subjects are taught on the high school level
Indicate whether the statement is true or false
The main cause of high condensing temperature and pressure in air cooled condensers is:
A) Refrigerant undercharge. B) Operating the condenser at low ambient temperatures without head pressure controls. C) Excessive airflow over the condenser. D) Dirty condensers.