The illumination from a point source 4 ft. above a surface is 100 foot-candles, and the surface is normal to the source. What will be the illumination level if the surface is tilted 45°?
A) 50 foot-candles.
B) 100 foot-candles.
C) 71 foot-candles.
C) 71 foot-candles.
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PROBLEM 2.32
The volume of a tensile specimen is essentially constant while plastic deformation occurs. If the initial diameter of the specimen is d1, show that when the diameter is d, the true strain is
Joann loves to play tennis. If she joins the local racquet club in order to have tennis partners,
she is joining because of instrumental benefits.
Indicate whether the statement is true or false.Swagelok Enterprises is a manufacturer of miniature fittings and valves. Over a 5-year period, the costs associated with one product line were as follows: first cost of $30,000 and annual costs of $18,000. Annual revenue was $27,000 and the used equipment was salvaged for $4000. What rate of return did the company make on this product?
What will be an ideal response?
The modern system of poultry and egg farming developed in the:
A. 1600s B. 1700s C. 1850s D. 1900s