<span>The law of conservation of energy states that energy can change from one form into another, but it cannot be created or destroyed. Or the general definition is: The totalenergy of an isolated system remains constant over time. ... A device that demonstrates the Law of Conservation of Mechanical Energy and Momentum.</span>
Answer:
Explanation:
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This is true. The specific u.s. department of health and human services (hhs) regulations that apply to research with children are known as subpart d: additional protections for children involved as subjects in research.
<h3>What is the protection of children as research subjects?</h3>
This has to do with all that has to be in place if children are to be used as participants in a research study. One of this would be to first get consent from the parents of the children. Due to the fact that the children cannot give consent on their own, their parents would have to sign a permission slip first.
Hence we can say that The specific u.s. department of health and human services (hhs) regulations that apply to research with children are known as subpart d: additional protections for children involved as subjects in research.
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Answer: Well the railroads made it possible for urban cities to get food and fuel other needed materials.
Explanation: When railroads came in it allowed more things to come and go through cities making it perfect for distributing needed goods for the people who lived there and nearby.
