: A wet soil sample with a water content of 15% and percentage air voids of 20% was oven dried. If the soil sample is cylindrical in dimension with length as 100 mm and diameter as 50 mm, then how much mass of water is present in the soil? Also calculate the mass of soil. Assume specific gravity of soil is 2.69 Interpret your answer and conclude how water content influences the unit weight of soil.
In: Civil Engineering
What percentage of the earth’s water is fresh water?
Why is it such a big problem to be cycling massive and growing volumes of grains and oil- seeds through livestock?
What are overrides? Use examples from the chapter.
Why are antibiotics used in animal feed, and why is this problematic?
Fundamental imbalances in the distribution of the world’s food supply is caused by cycling humanly edible grains and oilseeds through animals to produce flesh, eggs, and milk, destroying much more protein and other usable plant nutrition than it contributes to human societies (111). Explain.
In: Other
How can duration be used to determine a rough measure of the percentage change in the price of a bond as a result of interest rate changes?
In: Finance
In a
0.57mM
aqueous solution of trimethylacetic acid
C4H9CO2H
, what is the percentage of trimethylacetic acid that is
dissociated? You can find some data that is useful for solving this
problem in the ALEKS Data resource.
Round your answer to
2
significant digits.
In: Chemistry
Use the following table of states of the economy and stock returns to calculate the percentage standard deviation of a portfolio of a portfolio of 40 percent Roll and the rest in Ross.
|
Security if State |
Returns Occurs |
||
| Prob of State of Economy | Roll | Ross | |
| Bust | 0.1 | -17% | 27% |
| Boom | ? | 39 | 9 |
In: Finance
Methane gas (CH4) is burned in a combustor with a given percentage of excess air. The pressure and temperature of both the air and fuel are 101 kPa and 298 K respectively. Assume that the mole fractions are 79% nitrogen and 21 % oxygen for air (use M=28.97 kg/kmol and R=0.287 kJ/kg-K) and that water is a vapor in the exhaust. Given the values below, determine the following:
--Given Values--
m_fuel (kg) = 100
Excess Air = 25%
a) Determine the air fuel ratio (kmol_air/kmol_fuel) Answer=11.905 +/- 7.9E-02
b) Determine the amount (kmol) of fuel burned. Answer=6.2344 +/- 4.2E-02
c) Determine the amount (kmol) of air used. Answer=74.219 +/- 4.9E-01
d) Determine the amount (kmol) of CO2 produce Answer=6.2344 +/- 4.2E-02
e) Determine the amount (kmol) of H2O produced. Answer=12.4688 +/- 8.3E-02
f) Determine the amount (kmol) of N2 produced. Answer=58.6332 +/- 3.9E-01
g) Determine the amount (kmol) of O2 produced Answer=3.1172 +/- 2.1E-02
h) Determine the Enthalpy (kJ) of the reactants. Answer=-466646 +/- 3.1E+03
i) Determine the adiabatic flame temperature (K). Answer=2015.16 +/- 1.3E+01
j) Determine the Enthalpy (kJ) of CO2 in the products Answer=-1877561 +/- 1.3E+04
k) Determine the Enthalpy (kJ) of H2O in the products. Answer=-2099174 +/- 1.4E+04
l) Determine the Enthalpy (kJ) of N2 in the products. Answer=3323766 +/- 2.2E+04
m) Determine the Enthalpy (kJ) of O2 in the products. Answer=186323 +/- 1.2E+03
In: Chemistry
write about the increase percentage number of women in the workforce and its importance
In: Operations Management
Write a function hitRate(A, B) to return the percentage of elements in array A that match the elements with the same index in array B. A and B are 1darrays or 2darrays of the same shape. Sample: if X = np.array([1, 3, 5, 8]); Y = np.array([2, 1, 3, 8]), then hitRate(X, Y) returns 0.25. in python program
In: Computer Science
Write a method that returns the percentage of the number of elements that have the value true in an array booleans.
In: Computer Science
In a normal distribution curve, what percentage of the area under the curve is contained in the region, on one side of the mean, between 1 standard deviation from the mean and 2 standard deviations from the mean?
In: Math