The critical surface energy of a solid is 20 mJ/m2 (millijoules per square meter). The surface...
The critical surface energy of a solid is 20 mJ/m2 (millijoules per square meter). The surface energy of water is 72 mJ/m2. Explain if the solid surface is hydrophilic or hydrophobic.
Homework Answers
The surface is hydrophobic. Please find the explanation and calculation below.
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The critical surface energy of a solid is 20 mJ/m2
(millijoules per square meter). The surface...
Warm Up The surface of the Earth receives approximately 1000 W/m2 (Watts per square meter) of energy from the Sun....
Warm Up The surface of the Earth receives approximately 1000 W/m2 (Watts per square meter) of energy from the Sun. This number rises to about 1386 W/m2 in the upper atmosphere (r 6.4 x 106 m) The sun is 1 AU (1.496 x 1011 m) away Over what area is the Sun's energy spread at the Earth's distance? How much power is the Sun releasing?
Warm Up The surface of the Earth receives approximately 1000 W/m2 (Watts per square meter)...
The light energy that falls on a square meter of ground over the course of a typical sunny day is about 20 MJ . The ave...
The light energy that falls on a square meter of ground over the course of a typical sunny day is about 20 MJ . The average rate of electric energy consumption in one house is 1.0 kW . Part A got answer for part A and is correct On average, how much energy does one house use during each 24 hr day? Express your answer using two significant figures. =86 MJ Part B If light energy to electric energy conversion...
(a) What is the rate of energy loss in watts per square meter through a glass...
(a) What is the rate of energy loss in watts per square meter through a glass window 2.3 mm thick if the outside temperature is -8°F and the inside temperature is +72°F? W/m2 (b) A storm window having the same thickness of glass is installed parallel to the first window, with an air gap of 7.5 cm between the two windows. What now is the rate of energy loss if conduction is the only important energy-loss mechanism? W/m2
The insolation—the Solar energy delivered to the surface of the Earth—is about 1 kW per square...
The insolation—the Solar energy delivered to the surface of the
Earth—is about 1 kW per square meter. This is the energy you feel
when you are on the beach on a sunny day. What would be the
insolation at Jupiter in those same units? What about at
Pluto?
Problem 4: The insolation-the Solar energy delivered to the surface of the Earth-is about 1 kW per square meter. This is the energy you feel when you are on the beach on...
1 0 -11 points What is the rate of energy loss in watts per square meter...
1 0 -11 points What is the rate of energy loss in watts per square meter through a glass window 20mm thick the outside temperature -12" and the inside temperature is +72°F?
The installation cost of a 20 m3 (cubic meter) stainless-steel tank in 1975 was $5000. The...
The installation cost of a 20 m3 (cubic meter)
stainless-steel tank in 1975 was $5000. The tank is cylindrical
with flat top and bottom, and the diameter is 6 m. If the entire
outer surface of the tank is to be covered with 2-in. thickness of
Magnesia block, estimated the present total cost for the insulated
tank at 1980. The cost for the 2-in. magnesia block was $1.40 per
m2 (square meter) while the labor for installing the insulation was...
Fire load (MJ/m) is the heat energy that could be released per square meter of floor...
Fire load (MJ/m) is the heat energy that could be released per square meter of floor area by combustion of contents and the structure itself. The following cumulative percentages are for fire loads in a sample of 388 rooms: Value 900 0 150 300 450 600 750 Cumulative % 19.0 86.5 93.1 0 37.4 62.2 76.9 Value 1950 1050 1200 1350 1500 1650 1800 Cumulative % 95.1 97.8 98.4 99.5 99.6 99.8 100.0 (a) Construct a relative frequency histogram. Relative...
(a) What is the rate of energy loss in watts per square meter through a glass...
(a) What is the rate of energy loss in watts per square meter through a glass window 2.2 mm thick if the outside temperature is -20°F and the inside temperature is +80°F? (b) A storm window having the same thickness of glass is installed parallel to the first window, with an air gap of 6.9 cm between the two windows. What now is the rate of energy loss if conduction is the only important energy-loss mechanism? (The thermal conductivity of...
7. + -/1 points My Notes What is the rate of energy loss in watts per...
7. + -/1 points My Notes What is the rate of energy loss in watts per square meter through a glass window 3.0 mm thick if the outside temperature is -3°F and the inside temperature is +72°F? W/m2
(The installation cost of a 20 m3 (cubic meter) stainless-steel tank in 1975 was $5000. The...
(The installation cost of a 20 m3 (cubic meter) stainless-steel tank in 1975 was $5000. The tank is cylindrical with flat top and bottom, and the diameter is 6 m. If the entire outer surface of the tank is to be covered with 2-in. thickness of Magnesia block, estimated the present total cost for the insulated tank at 1980. The cost for the 2-in. magnesia block was $1.40 per m2 (square meter) while the labor for installing the insulation was...
Warm Up The surface of the Earth receives approximately 1000 W/m2 (Watts per square meter) of energy from the Sun. This number rises to about 1386 W/m2 in the upper atmosphere (r 6.4 x 106 m) The sun is 1 AU (1.496 x 1011 m) away Over what area is the Sun's energy spread at the Earth's distance? How much power is the Sun releasing?
Warm Up The surface of the Earth receives approximately 1000 W/m2 (Watts per square meter)...
The insolation—the Solar energy delivered to the surface of the
Earth—is about 1 kW per square meter. This is the energy you feel
when you are on the beach on a sunny day. What would be the
insolation at Jupiter in those same units? What about at
Pluto?
Problem 4: The insolation-the Solar energy delivered to the surface of the Earth-is about 1 kW per square meter. This is the energy you feel when you are on the beach on...
1 0 -11 points What is the rate of energy loss in watts per square meter through a glass window 20mm thick the outside temperature -12" and the inside temperature is +72°F?
The installation cost of a 20 m3 (cubic meter)
stainless-steel tank in 1975 was $5000. The tank is cylindrical
with flat top and bottom, and the diameter is 6 m. If the entire
outer surface of the tank is to be covered with 2-in. thickness of
Magnesia block, estimated the present total cost for the insulated
tank at 1980. The cost for the 2-in. magnesia block was $1.40 per
m2 (square meter) while the labor for installing the insulation was...
Fire load (MJ/m) is the heat energy that could be released per square meter of floor area by combustion of contents and the structure itself. The following cumulative percentages are for fire loads in a sample of 388 rooms: Value 900 0 150 300 450 600 750 Cumulative % 19.0 86.5 93.1 0 37.4 62.2 76.9 Value 1950 1050 1200 1350 1500 1650 1800 Cumulative % 95.1 97.8 98.4 99.5 99.6 99.8 100.0 (a) Construct a relative frequency histogram. Relative...
7. + -/1 points My Notes What is the rate of energy loss in watts per square meter through a glass window 3.0 mm thick if the outside temperature is -3°F and the inside temperature is +72°F? W/m2
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