To employ an access key, press and hold down the Alt key as you tap the access key.
Answer:
Opportunity cost refers to what you have to give up to buy what you want in terms of other goods or services. When economists use the word “cost,” we usually mean opportunity cost.
Explanation:
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Answer:
The devices that can be used to perform both functions -input and output- are called Dual Devices. These devices are also called Dual Purpose Devices or Both Input/Output Devices. With the help of a dual-purpose device, we can enter data into computers as well as we can output data from the computer to outside world.
Explanation:
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Answer:
Jorge would need over 13
number of 9 volts battery to create 120 volts.
Explanation:
A series connecting is one in which two or more batteries are connected terminal-to-terminal, so that the same current flow through each battery. Each battery has an internal resistance, r, which is the opposition to the flow of current by the battery itself.
The total emf, E, of a given number of cells connected in series is given by;
E = 
+ 
+ 
+ 
+ .........
And each of the cell has an internal resistance, r. So that the total internal resistance of the cells in series is;
r = 
+ 
+ 
+ 
+ .......
Thus, Jorge's mistake was that 13 number of 9 volts batteries would not give 120 volts because each battery has its internal resistance. Therefore the appropriate answer is that he would need over 13 number of 9 volts battery to create 120 volts.
