A situation that illustrates two quantities that combine to make 0 would be when one quantity is positive and the other is negative, with equal magnitude. For example:
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Financial Example: You have $50 (a positive quantity) and you owe $50 (a negative quantity). When you combine these amounts, $50 - $50 = $0.
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Temperature Example: If the temperature is 20 degrees Celsius (positive) and you experience a drop of 20 degrees Celsius (negative), the total change in temperature would be 20 - 20 = 0 degrees Celsius.
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Movement Example: If you walk 5 meters forward (a positive quantity) and then walk 5 meters backward (a negative quantity), your overall displacement would be 5 - 5 = 0 meters.
In all these examples, the two quantities effectively cancel each other out, resulting in a total of 0.