Sometimes two or more substances react with one another and can become more hazardous. This is called ____________________.
Fill in the blank(s) with the appropriate word(s).
synergism
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The output produced in bushels and the prices of this output ($/bushel) over the last three years for Seth Johnson, a farmer in Amarillo, Texas, are as follows
Let the base year be 2011. Relative to 2011, the price of this commodity in 2012 was higher by
________ percent.
A) 82.86
B) 20.69
C) 9.38
D) 12.9
Scientific notation uses increments of 1000 as well as word abbreviations to make large and small numbers less confusing.
Answer the following statement true (T) or false (F)
An AISI 316 stainless steel spherical container is used for storing chemicals undergoing exothermic reaction that provides a uniform heat flux of 60?kW/m2 to the container’s inner surface. The container has an inner diameter of 1 m and a wall thickness of 5 cm. To prevent thermal burns on individuals working around the container, it is necessary to keep the container’s outer surface temperature below 50°C. If the ambient temperature is 23°C, determine the necessary convection heat transfer coefficient to keep the container’s outer surface temperature below 50°C. Is the necessary convection heat transfer coefficient feasible with free convection of air? If not, discuss other options to prevent the container’s outer surface temperature from causing thermal burns.
?Geothermal reservoirs with temperatures _____ offer a source of direct heating for homes, offices, and greenhouses.
A. ?greater than 300°F B. ?less than 300°F C. no greater than 220°F D. ?equal to or less than 220°F