On a chilly afternoon, you decide to use a portable electric heater to warm the air. Describe the heat transfer processes that occur.
What will be an ideal response?
The electrical heater converts electrical work into heat by increasing
the temperature of the heating elements. They radiate heat to the air, and
most heaters have a fan blowing air over the heating elements, so heat is
transferred by convection to the air.
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A farmer started irrigating a soil some 10 years ago, but in recent years, yields have declined, and the soil's physical condition has deteriorated. Which of the following most likely accounts for this situation?
A) high gypsum content in the soil B) high content of Ca and Mg in the irrigation water C) failure to use conservation tillage to reduce salt accumulation at the soil surface D) excessive drainage of the soil E) high SAR of the irrigation water
?Which method offers the ability to transfer printed designs to irregular surfaces?
A. ?letterflex B. ?plating C. ?letterpress D. ?engraving
What size is specified for the mounting holes in the axle support block?
Review drawing number 523854C0A and then answer the question.
What happens to the liquid head in a centrifugal pump as the flow rate is increased?
A. It increases. B. It decreases. C. There is no change. D. It deadheads.