Pedro is conducting an experiment to investigate how temperature affects chemical change. He has three pieces of bread. He puts one piece of bread on the kitchen counter, puts one piece in the refrigerator, and puts one piece in the toaster. His prediction is that the piece in the refrigerator will get cold, the one on the counter will hot, and the one in the toaster will get the hottest. Select the conclusion for Pedro’s experiment. The piece of bread in the toaster had the least amount of chemical change. The piece of bread in the refrigerator had the most amount of chemical change. The piece of bread in the toaster had the most amount of chemical change. The piece of bread on the kitchen counter had the most amount of chemical change.

Answer: The piece of bread in the toaster had the most amount of chemical change due to exposure to heat

Which of the following describes when the trial and error approach to problem solving is most successful?


when the problem has a single possible option

when the problem has a limited number of options

when the problem has an alternate solution method

when the problem has numerous possible options

Which of the following is NOT an optional service? rustproofing
fabric protectants
keyless start
manufacturer's warranty

Aspectos de las técnicas escultóricas

8. In the commercial production of sugar (sucrose), the product crystals are washed and centrifuged to partial dryness. The crystals are then sent through a rotary dryer where they are contacted with a hot stream of air that reduces the moisture content from 1:0 wt% to 0:1 wt%. The ratio of wet sugar to inlet air fed to the dryer is 3.3 kg wet sugar/kg inlet air. The inlet air contains 1.5 mole% water. (a) Draw and label the flowchart and do the degree-of-freedom analysis. (b) Taking a basis of 100 kg of wet sugar fed to the dryer, calculate the mass of water and its mole fraction in the air leaving the dryer. (c) If 1000 tons/day of dried sugar is to be produced, at what rate (lbm/h) is water evaporated from the sugar

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if a tin can can, can a tin can can?