What are Polya's steps to problem solving?
What will be an ideal response?
One of the most famous writers on problem solving was George Polya, a mathematician dedicated to improving mathematics education. In 1945, he wrote the book How to Solve It to summarize his work on problem solving. Polya's four steps to problem solving are:
1. Understand the problem
2. Make a plan
3. Carry out the plan
4. Look back on the plan; how could it have been better?
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This machine can be used to cut material to length or for cutting a narrow slot called a kerf.
a. saw machine b. grinding machine c. lathe d. milling machine
When a typical CR-EHI is energized by the injector driver, which of the following occurs first?
A. pressure in the valve control chamber rises B. pressure in the valve control chamber collapses C. an injection pulse begins D. an injection pulse
What is three-phase AC, and why is it often used to power electric motors?
What will be an ideal response?
On a 95°F day, the R-22 refrigerant pressure on the high side should be about ____ psig.
A. 182 B. 108 C. 297 D. 243