Q1/ A soil sample of diameter of 38 mm and length of 76 mm has a wet weight of 1.6 N and a dry weight of 1.2 N. Determine:
a- The water content.
b- The degree of saturation.
C. The porosity.
d - The Bulk unit weight.
e. The dry unit weight.

Ahouse has the following electrical appliance usage (1) single 40w lamp used for 4 hours per day (2) single 60w fan used for 12 hours per day (3) single 200w refrigerator that runs 24 hours per day with compressor run 12 hours and off 12 hours find the solar power inverter size in watt with correction factor of 1.25.

What precautions should you take to prevent injuries when dealing with heavy loads?

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?