Ans is <span>I. Flowing groundwater that dissolves rock , such as limestone</span>
Answer:
Efficiency = 80%
Explanation:
Given the following data;
Work output = 240 N
Work Input = 300 N
To find the mechanical efficiency of a machine;
Substituting into the equation, we have;

Efficiency = 80%
Therefore, the mechanical efficiency of the machine is 80 percent.
The answer is d. Wavelength
Answer:
1D
2C
3C
4C
5D
6D
7D
8D
9B
Explanation:
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