Answer:
practice effects
Explanation:
Based on the information provided within the question with regards to Leigh's experiment it can be said that her biggest concern should be practice effects. This term refers to the effects or changes that can occur when repeating the same experiment various times with the same participants. Which is what Leigh is doing, as she is only changing one variable but repeating the same experiment.
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Answer:True
Explanation:Grounding of electric currents are a major factor that helps to guarantee the protection of buildings against power surges and fire from electric sparks.
A grounded system is an electric connection system which ensures that one or more conducting point which usually is the Neutral point of electric switches are solidly grounded or though a current limiting device. This will prevent damage of properties or other Electric appliances as a result of over currents etc.
The correct answer is letter B. The movement of the center of population of the US was from South to North. This is because ports started to open in the North allowing more industries to open and the demand for labor was high. It was an eye-opener and an opportunity for people of the South hence there were great migrations that happened in the history of the US.
Today Canada closely resembles the U.S. in its market-oriented economic system and pattern of production. As of February 2013, Canada's national unemployment rate stood at 7.0%, as the economy continues its recovery from the effects of the financial crisis of 2007–08.
Well, when the gas price is increased, people want to use the car that has low usage in gas.
So the demand and supply of fuel-efficient cars in the short run will be increased.
But as the year passes, supply will started to slowly dropping
hope this helps
