An engineer evaluates the effectiveness of using hydroelectr - GED Prep
Question
An engineer evaluates the effectiveness of using hydroelectric power to generate energy. She builds a tin water wheel and attaches a string that has a weight at the end. water is poured onto the wheel using a small and large funnel. Under both conditions, multiple trials are performed to obtain preliminary results. These results showed that the water had to be poured in a specific location on the water wheel in order for the wheel to spin.
Result 1: When a 70 kilogram weight was placed at the end of the string it took 11 seconds for the water wheel to lift the weight using a small funnel.
Result 2: When a 70 kilogram weight was placed at the end of the string it took 7 seconds for the water wheel
to lift the weight using a large funnel.
The engineer concluded that water flow influences the amount of energy produced.
Which piece of evidence from the passage supports the hypothesis that energy produced from the water wheel will lift the weight?
Answers
-
-
-
-
correct
Explanation
The correct answer is: Use of a large funnel allows the weight of the string to move faster.
The evidence supporting the hypothesis that energy produced from the water wheel will lift the weight is the difference in time taken to lift the weight using different funnel sizes. With the large funnel, it took 7 seconds to lift the weight, compared to 11 seconds with the small funnel. This faster lifting time indicates that more energy is produced with increased water flow, directly supporting the engineer's conclusion about water flow influencing energy production.
No Payment Cards Needed
