Answer:
adaptations (based on natural selection)
The correct answer is option (B) lemon juice.
pH refers to the logarithmic scale used to indicate the acidity or basicity of an aqueous solution. It is the negative of the base 10 logarithm of the activity of the hydrogen ion. Solutions with a pH less that 7 are considered acidic and the solutions with a pH greater that 7 are considered to be basic. A pH of 7 is neither an acid nor a base and is considered neutral.
An acid has a high concentration of hydrogen ions (H+) and a base has a low concentration of hydrogen ions. Higher the hydrogen ion concentration, pH is acidic. Among the given substances, lemon juice has a pH of 2, urine has a pH of 6, tomato juice has a pH of 4 and black coffee has a pH of 5. Since lemon juice has a pH of 2, it has the lowest –OH ion concentration.
A car needs to be fueled before it can set in motion to posses a given amount of kinetic energy.
<h3>What is energy?</h3>
Energy is the capacity of doing work. In physics, there exist different types of energy; among which are follows:
- Kinetic energy: Kinetic energy can simply be defined as that energy a body posses due to its motion
- Potential energy: , On the other hand, potential energy is the energy a body has due to its relative position.
Other forms of energy include:
- Solar energy
- Nuclear energy
- Mechanical energy
So therefore, a car needs to be fueled before it can set in motion to posses a given amount of kinetic energy.
Therefore, kinetic energy is the energy which allows a car to be fueled before it can set in motion .
Learn more about kinetic energy:
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Mitochondria by using cellular respiration to make ATP
The two types of crust are oceanic and continental, the lithosphere is composed of earth's crust and upper most mantle
