Answer:
She could time how long it takes for each amount of salt dissolves in the waters. (as well as keep each amount of salt the same if she was not doing that already.)
Explanation:
This way, she could observe which water is best for dissolving solvents and which is most affective in the shortest amount of time. If she was not timing how long it takes for salt to dissolve in different temperatures of water, then the experiment may as well have been useless unless there is somehow a different objective.
Answer:
Evelyn's ______ is the practical use of solar power in a vacuum cleaner that is designed to effortlessly vacuum clean the floors of on-the-go and elderly consumers.
A) product idea
B) product concept
C) product image
D) prototype
E) promotional product
Answer: B
Explanation:
Evelyn's product concept from the above was born from thorough research to determine best quality and best performance product for her target market- her on-the-go and elderly consumers. The product concept is a very important concept in marketing that deals with maximizing product features to suite target market, therefore reaching market potential.
Answer:
a volcanic eruption must have occurred nearby which scared the sea creatures away
Explanation:
most sea creatures are scared by volcanic eruption
Answer:
There should be 10% thymine
Explanation:
DNA bases come in specific pairs. Guanine pairs up with cytosine and adenine pairs up with Thymine.
According to the problem the DNA sample was 40% cytosine and 40% guanine, so this is correct, there are equal amounts of cytosine and guanine. Now Thymine needs to have equal amounts as adenine, but adenine only has 10%.
If we match up the amount of adenine to thymine, we would have 15% adenine and 15% thymine, but that would excede 100%. So you need to match the thymine to adenine.
10% adenine + 10 % thymine + 40% cytosine + 40% guanine = 100%
Your circulatory system consists of your heart, blood vessels and blood, and is responsible for transporting life-giving oxygen throughout your body. When you exercise, your body's need for oxygen increases; the harder you work out, the more oxygen your body demands.
