An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
Answer (2)
In 30 seconds, a current of 15.0 A will result in approximately 2.81 x 10^21 electrons flowing through the device. This is calculated using the relationship between current, charge, and the charge of a single electron. The total charge can be determined by multiplying the current by the time.
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The quantity demanded is 60 and the quantity supplied is 60 at a price of $100 .
The quantity demanded is 40 and the quantity supplied is 70 at a price of $125 .
As the price rises from $100 to $125 , the quantity demanded decreases.
Consumers will want to buy fewer pairs of shoes, so the answer is Consumers will want to buy fewer pairs of shoes.
Explanation
Understanding the Problem We are given a supply and demand schedule for running shoes and asked to determine what happens when the price rises from $100 to $125.
Analyzing the Situation at $100 At a price of $100, the quantity demanded is 60 pairs of shoes, and the quantity supplied is also 60 pairs of shoes. This indicates that the market is in equilibrium at this price.
Analyzing the Situation at $125 At a price of $125, the quantity demanded is 40 pairs of shoes, and the quantity supplied is 70 pairs of shoes.
Determining the Change in Demand When the price rises from $100 to $125, the quantity demanded decreases from 60 to 40. This means consumers want to buy fewer pairs of shoes at the higher price.
Evaluating the Options Now, let's evaluate the given options:
'The cost to make a pair of shoes will rise.' - This is not directly indicated by the supply and demand schedule.
'A scarcity of shoes will result.' - At $125, the quantity supplied (70) is greater than the quantity demanded (40), so there will be a surplus, not a scarcity.
'Profits from selling shoes will increase.' - This is possible, but not guaranteed. It depends on the cost of production and other factors not provided in the table.
'Consumers will want to buy fewer pairs of shoes.' - This is exactly what we observed when the price increased from $100 to $125.
Conclusion Therefore, the correct answer is that consumers will want to buy fewer pairs of shoes.
Examples
Understanding supply and demand schedules is crucial in economics. For example, if you're selling lemonade and notice that fewer people buy it when you raise the price, you're experiencing the same principle. Businesses use these concepts to set prices that maximize their profits while still attracting customers. This helps them make informed decisions about production and pricing strategies.
