For the following (10 times) voltage measured voltage values of a designed power supply:

5.0 4.9 5.1 5.2 5.3 4.8 4.9 4.7 5.0 5.1

Determine:

a. The mean of the voltage readings

b. Average Deviation

c. Standard Deviation

d. The probable errore. Determine the probable error as a percentage.

f. The overall error knowing that the known error in the supply output is

1.5%.​

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?