A caisson is a watertight enclosure that can be pumped dry so that construction activities, such as the construction of piers can take place
Indicate whether the statement is true or false
F
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Many sites do not require instantaneous drainage, which could overtax the public sewer system. How can runoff be delayed? Select all that apply.
A) Building covered parking. B) Letting the ground gradually absorb water. C) Creating a storm water holding area. D) Undersizing the drainpipes.
This problem concerns a compound that has the following physical properties:
Critical Temperature = 1000 K Critical Pressure = 100 bar Vapor pressure at 450 K = 4 bar Molar Volume of saturated liquid at 450 K = 300 cm3/mol Enthalpy of vaporization at 450 K = 15 kJ/mol In the VAPOR and GASEOUS states only, it is described by the equation of state: Z = 1 + BP + CP2 Where B = -0.02 bar-1 and C = 0.0005 bar-2 A) Derive an algebraic (i.e., no differentials or integrals) expression for the fugacity of the compound in the gas/vapor state as a function of temperature, pressure, and known constants. B) Use the Clausius-Clapeyron equation to calculate the vapor pressure of this compound at 500 K. C) List the assumptions made in the derivation of the Clausius-Clapeyron equation and comment on how good or bad they are for the example in part B. D) Give your best estimate of the fugacity of this compound in the LIQUID phase at T=500 K and P=50 bar. You may assume your answer to part B is a correct vapor pressure, even if in part C you expressed reservations about its accuracy.
When incomes are high, the demand for beef increases while the demand for poultry decreases
Indicate whether the statement is true or false.
____ digesters maximize biogas production through the use of a large, plastic surface area
a. Covered lagoon c. Plug flow b. Complete mix d. Fixed film