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A material has a dry mass of 115 g, volume in natural state is 55cm3, volume in absolute compact state is 35 cm3 and volume in oven dry state is 30 cm3. Calculate the following in kg/m3:
a. Density
b. Apparent density
c. Bulk Density
d. Solidity
e. Porosity
A concrete mixture needs 660 kg dry sand and 1240 kg dry stone. It is known that the water
content of the existing sand is 4% and that of the stone is 1%. Calculate the amount of wet
sand and wet stone respectively.
A material has a volume of 1m3 and a mass of 2400kg in natural state. The volume of its
pores accounts for 25%. Calculate its density.
I. What are the possible risks of using chemicals?
II. How can you protect yourself from hazardous chemicals?
III. What are you going to do if you inhaled hazardous chemicals?
IV. How can you protect the environment from chemical hazards?
Calculate the specific volume, entraphy and specific internal energy of wet steam at 18 bar, dryness fraction 0.9
The standard heat of combustion of liquid benzene (giving liquid water) is -41.88 kJ/g at 25°C. The heats of formation of carbon dioxide and water vapor are -393.51 and -241.82 kJ/mol, respectively, at 25°C and one bar pressure. Calculate the enthalpy change for the formation of benzene (C6H6) from the elements at 25°C and one bar.
Find, approximately, the amount of metal in a closed tin can 3 inches in diameter and 5 inches
high, if the metal is 1/32 inches thick.
Find, approximately, the amount of metal in a closed tin can 3 inches in diameter and 5 inches high, if the metal is 1/32 inches thick.
Find by use of differentials the approximate total area of a right circular cone whose base radius and height are 5.03 inches and 11.89 inches, respectively.
Station of the PI of the curve: 7+400
Elevation of
L1 =
L2 =
G1 = G2 =
the PI of the curve: 80m.
160m
120m
+7%
-4%
a) Determine
starting from PC to PT. Tabulate your answer and show solutions.
