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1 Pretest: Unit 1
Question 1 of 25
Detailed computer drawings are used to model how the different parts of a
rocket will work together. What is a limitation of this model?

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.

What component of earth’s atmosphere exists entirely as a result of photosynthesis?

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?