In 1913 a scientist named ____ presented the most accepted theory concerning the structure of an atom.
a. J. J. Thompson
b. Niels Bohr
c. Isaac Newton
d. John Dalton
b. Niels Bohr
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Technician A says that a two-wire COP system uses the PCM to trigger the coil. Technician B says that a three-wire COP system has an ICM built into the coil assembly. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
What is one of the main reasons the rooftop units has to be level?
What will be an ideal response?
Air occupies a balloon that has an initial volume of 0.05 m3. Initially, the air has a temperature of 20oC and a pressure of 125 kPa. The air is heated, and the balloon expands until the volume of 0.25 m3. The pressure and volume are related through pVn = constant. Develop a computer program model for analyzing such a process/device. Plot the final temperature of the air, the work done, and the heat transfer for values of n = 1.1, 1.2, 1.3, 1.4, and 1.5.
Given: Air; T1 = 20oC = 293 K; P1 = 1000 kPa; V1 = 0.05 m3; V2 = 0.25 m3; PVn = constant Assume: ?KE = ?PE = 0. The air is an ideal gas with constant specific heats (cv = 0.718 kJ/kg-K; R = 0.287 kJ/kg-K) What will be an ideal response?
Vegetables used for processing are often picked based on acid, sugar, and color levels, which can be measured by instruments
Indicate whether the statement is true or false