____ lights are designed to simulate the effect of distant light sources, such as the sun, that are so far away from objects in the scene that lighting and shadow patterns in the scene appear to be parallel.
A. Point
B. Directional
C. Ambient
D. Spot
Answer: B
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Gas metal arc welding and flux cored arc welding are similar welding processes.
Answer the following statement true (T) or false (F)
Explain what embodied energy in a building means.
What will be an ideal response?
Lego Group in Bellund, Denmark manufactures Lego toy construction blocks. The company is considering two methods for producing special-purpose Lego parts. Method 1 will have an initial cost of $400,000, an annual operating cost of $140,000, and a life of 3 years. Method 2 will have an initial cost of $600,000, an operating cost of $100,000 per year, and a 6-year life. Assume 10% salvage values for both methods. Lego uses an MARR of 15% per year. (a) Which method should it select on the basis of a present worth analysis? (b) If the evaluation is incorrectly performed using the respective life estimates of 3 and 6 years, will Lego make a correct or incorrect economic decision? Explain your answer.
What will be an ideal response?
A tunnel diode is often used in a
A) negative resistance oscillator B) forward resistance oscillator C) backward resistance oscillator D) positive resistance oscillator