Answer:
identify the variables
Explanation:
control:type of lemon used
dependent:whether apple slice turns brown at pH>2
independent:pH value
A chemical reaction happens
Answer:
Solar Energy
Explanation:
I know Hydroelectric Energy is the largest, but I'm not sure about this.
Please tell me if I'm wrong.
Answer:
Scarcity factor implies that shortages of goods & services. Price of commodities depends upon scarcity factors.
Explanation:
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