Answer:
B. an air-conditioning system.
Explanation:
Refrigeration is defined as a process of cooling a system to lower temperature below the surrounding temperature while the removed heat is rejected at higher temperatures.
Heat pumps use the heat output of the refrigeration process, which may also be designed to be reversible, but are otherwise similar to air conditioning units.
Answer: c
Explanation:
during the industrial revolution americans were switching from rural to urban life, thus using up more fossil fuels, and working in factories
Answer:
mass/volume
Explanation:
The slope is rise over run, or y over x. The mass is y on this graph, and the volume is x on this graph. The slope represents mass over volume.
In the given equations for chemical reaction, The Equation No. 2 represents an endothermic chemical reaction.
<h3>What is an Endothermic Chemical Reaction ?</h3>
A reaction which uses energy for the formation of products is known as endothermic reaction.
In the Given Equations,
Equation no. 2 shows the uses of energy with reactants at right hand side which accounts the involvement of energy for the formation of product.
Hence, Equation 2 is a Endothermic chemical reaction.
Learn more about endothermic reaction here ;
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