For which of the following refrigeration systems/appliances would it be permissible to use a passive recovery device for refrigerant recovery? A. a centrifugal air conditioner
B. a reciprocating liquid chiller
C. a single compressor, large commercial walk-in freezer
D. a domestic refrigerator

In one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.

Smallest intensity of a stimulus that you can detect 50 percent of the time is