Choose the best answer for each situation. A scientist with the EPA examining water for contamination writes down that there was an iridescent sheen on the surface of the water. What type of data did the scientist record?

Answers

Answer 1

Answer: The scientist has written down and example of qualitative data. Since he specifically wrote down that there was an iridescent sheen on the surface of the water, he is writing down the quality of water as seen by him. The type or condition cannot be expressed numerically, which makes it a qualitative type of data.

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The Earth's crustal plates move due to _____ currents.conventioncondensationconvectioncollaboration
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A bookshelf is 2m long, with supports at its end (p and q). A book weighing 10N is placed in the middle of the shelf. what are the upward forces acting on p and q. if the book is moved 50 cm from q, what are the forces at p and q now?

Answers

When the book is placed in the middle, the forces acting on p and q is 5N. When the book is moved 50 cm from q, the forces at p and q can be solved by doing a moment balance
With p as the pivot
Fq (2 m) = 10 N (0.5 m)
Fq = 2.5 N
and
Fp = 10 N - 2.5 N = 7.5 N

Answer:

Fq = 2.5N

Fp = 7.5N

Explanation:

Hello! Let's solve this!

When the book is in the middle, the force in p (Fp) and the force in q (Fq) are equal, and half of the total force

Fp = Fq = 5N

When the book moves 0.5m from q we have a balance

Fq * 2m = 10N * 0.5m

We cleared Fq

Fq = (10N * 0.5m) / 2m

Fq = 2.5N

Fp = 10N-Fq = 10N-2.5N = 7.5N

Conclusion

Fq = 2.5N

Fp = 7.5N

Where does wave reflection occur?at boundaries between two different media
while a wave is propagating through a single media
when two waves moving in opposite directions collide
none of the above

Answers

The correct answer for the question that is being presented above is this one: "none of the above." Wave reflection happens there is a change in direction of a wavefront. This wavefront is at an interface between two different media, which makes the wavefront returns into where it is originated.

Answer:

The correct answer is actually "at boundaries between two different media"

Explanation:

Checked and it is said word for word in the corresponding slide

What is the example of a sport related activity

Answers

sports are games so lets do process of elimination
A.) weight lifting (exercise)
B.) Soccer (sport)
C.) jump rope (exercise)
D.) Running a race (exercise) but questionable

i would say B.) soccer

The correct answer is B. Soccer
Hope this helps you and have a good night! :3

A fishing boat using sonar to locate fish is employing

Answers

A fishing boat using sonar to locate fish is employing reflection.

How many electrons does an atom with 8 protons and no charge have? 7
9
5
8

please help