Define green chemistry.
What will be an ideal response?
Green chemistry is the term that has been given to environmentally
friendly products and processes, and the 21st Century chemical industry’s
major goal. The goals for green chemistry include decreased waste and
energy, increased economical processes, and increased safety for the plant
technician, the environment, and the consumer.
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____ is a uniform force that affects all structures.
A. Heat B. Cold C. Gravity D. Wind
What is the benefit of an overdrive gear ratio in a transmission?
A) Lowers engine speed to obtain better fuel mileage B) Allows the uses of fewer gear sets in the transmission C) Lowers driveshaft speed D) None of these
Why are single-element fuses particularly suited for the protection of circuit breakers with low interrupting ratings?
a. They have a high speed of response to overcurrents. b. They have a low speed of response to short circuit currents. c. They can be applied in circuits subject to temporary motor overload. d. They can be used in circuits other than motor branch circuits and feeders, such as lighting circuits.
The oxygen equivalence number of a weld is a number that can be used to predict properties such as hardness, strength, and ductility. The article “Advances in Oxygen Equivalence Equations for Predicting the Properties of Titanium Welds” presents several equations for computing the oxygen equivalence number of a weld. One equation, designed to predict the hardness of a weld, is X=O+2N+(2/3)C, where X is the oxygen equivalence, and O, N, and C are the amounts of oxygen, nitrogen, and carbon, respectively, in weight percent, in the weld. Suppose that for welds of a certain type, 
a. Find 
.
b. Suppose the weight percents of O, N, and C are independent. Find 
.