Answer:
A mechanical brake applies a friction force to convert the kinetic energy of the vehicle into thermal energy which then dissipates into the atmosphere. As with any system, the process of braking must follow the principle of conservation of energy.
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The correct answer is: A. How does changing the amount of water affect the growth of corn?
While options B, C & D are not impossible to test, option A is the only question that can be tested using quantitative methods, such as statistical analysis. The question in option A states: "How does changing the amount of water affect the growth of corn?". This question is easily testable using scientific investigation, because controlled or measured amounts of water can be added to corn, and the consequent growth rate of corn can be easily measured and recorded. However, the questions in options B, C & D cannot be precisely measured using quantitative tools, since they aim to measure qualitative (subjective) factors, such as: ethics, happiness and disappointment.
Answer:
It has high temperatures and low precipitation. the reason this would be corect is because, if very little preicipitation/rain/water doesn't happen then how are the tree suppsoed to get it nutrients or how are the leaves suposed to get its nutrients so it doesn't because rotten and fall of the branches. Some areas that may not have much precipitation coming in, may most likely not have tress in the whole area or everywhere.
Answer:
A frogs heart has 3 chambers. Two atria and a single ventricle.
Answer:the decline of lichens is an important indicator of an imbalance in the ecosystem. this research can help system ecologists predict how pollution will affect the entire ecosystem
Explanation:
