Which statement is true?

in economics, land refers to all the natural resources found on land alone.

in economics, capital includes only tangible objects used for production.

a point on the ppc indicates maximum utilization of available resources.

a point under the ppc indicates overutilization of available resource

The statement that is true is "A point on the PPC indicates maximum utilization of available resources." A production possibility curve or PPC is also known as 'production possibility frontier' and 'boundary or line.' It is a curve that help indicates the maximum combination of any two goods. Its advantage determines what an economy could produce if all its resources were fully employed and organised as efficiently as possible..

1.       My hypothesis was that The house hold liquids such as lemonade clear soda and the clear shampoo would be acidic where as the baking soda dish soap and fertilizer would be basic. my hypothesis was somewhat correct all but the soda was correct by the looks of the colors.

2.      Some liquids required more because the strength of the acidity or base wasn't very strong thus requiring a larger amount of liquid added to the cabbage indicator.

3.      At the end of the experiment when the vinegar and baking powder were added together the colors mixed into a mix of the two more purple then the cabbage indicator and there was plenty of bubbles in the solution.

4.      Not very useful unless you know exactly what the colors indicate. Yes, all that would be needed is a ph scale.

5.      Acids and base indicators help us identify whether a substance is acidic or basic . They can be used to detect the nature of soil , samples etc which can be helpful.