Explain Ohm's Law.
What will be an ideal response?
The science of electricity tells us that for electrical power lines (conductors) the current (I) is directly proportional to the voltage (V) and is inversely proportional to the resistance (R) of the conductor. This relationship is called Ohm's law and is written as follows:
I = V/R
Ohm's law is valid for any electrical circuit, from expansive power transmission lines to tiny computer chips.
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The compounds A and B form non-ideal solutions in the liquid phase. At 50 ?C, a mixture of A and B has an EXCESS molar enthalpy as given below:
The heat capacities of the liquids are modeled as constant. Both are equal to CP=50 J/mol-K.
In a steady-state, constant pressure process, 1000 mol/min of pure A at 25 ?C is mixed with 500 mol/min of pure B at 35 ?C. The mixture then enters a heat exchanger in which the mixture is heated to 50 ?C.
A. Determine the rate at which heat is added to the heat exchanger.
B. If we are using a reference state in which the molar enthalpy, ?H, of pure A and pure B are both 0 at a temperature of 25 ?C, then what is the partial molal enthalpy, ¯H, of compound A in the mixture that is leaving the heat exchanger?
Sites with 25% or less of the property boundary adjacent to existing development are considered ____ developments.
A. edge B. Greenfield C. Bluefield D. bordered
Plans call for a 162' long brick wall to have one 24" wide pilaster at each end and another nine 24" wide pilaster uniformly spaced along its length. What is the sum of the lengths of the pilasters in feet?
What will be an ideal response?
The earliest recorded timber shortage occurred in ____, about 5,000 years ago
A) China B) United States C) Europe D) Spain