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3 years ago

Ayden has been asked to wear a protective vest while his dentist takes an X-ray. Why is this?

Biology

2 answers:

Vedmedyk [2.9K]3 years ago

5 0

This is an easy question:

Answer: you wear a vest because you dont want anything to get on your clothes just incase if like the x-ray machine breaks.

I have to wear a protective vest for x-rays when I got to the dentist for them to check and see if my over bite improved so that is why you have to wear a protective wear (just for the safety of others and yourself).

charle [14.2K]3 years ago

3 0

When the dentist takes an X-ray it uses a small amount of radiation which can be harmful to humans. The vest will protect to a certain extent the effect of radiation by absorbing the dangerous particles or molecules produced by the X-rays.

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Source Net:

. . . a Line graph.

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. . . a Pie Chart.

Pie charts are best to use when you are trying to compare parts of a whole. They do not show changes over time.

. . . a Bar Graph.

Bar graphs are used to compare things between different groups or to track changes over time. However, when trying to measure change over time, bar graphs are best when the changes are larger.

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. . . an X-Y Plot.

X-Y plots are used to determine relationships between the two different things. The x-axis is used to measure one event (or variable) and the y-axis is used to measure the other. If both variables increase at the same time, they have a positive relationship. If one variable decreases while the other increases, they have a negative relationship. Sometimes the variables don't follow any pattern and have no relationship.

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3 years ago

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I believe it is number 3.

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1. How did dark matter affect the development of structures in the early universe?

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Answer:

1. It seeded the development of galaxies

2. The percentage of dark matter has shrunk in scientists' estimates since the 1980s

The percentage of unknown material has grown in scientists' estimates since the 1970%

3. Supernovae that are moving away at an accelerating rate.

Explanation:

1. How did dark matter affect the development of structures in the early universe?

It seeded the development of galaxies.

It seeded the development of quasars.

It cooled pockets of gas to form nebulae.

it became part of black holes

2. How has scientific understanding about the composition of the universe changed over time? Select the two correct answers.

The percentage of dark matter has shrunk in scientists' estimates since the 1980s

The percentage of unknown material has grown in scientists' estimates since the 1970%

The percentage of ordinary matter has grown in scientists' estimates.

The percentage of dark energy has shrunk in scientists estimates

3. Which is evidence for the existence of dark energy?

Pulsars that seem to be moving closer at an accelerating rate.

Supernovae that are moving away at an accelerating rate.

Black holes that are expanding at a constant rate.

Galaxies that are rotating at a constant rate.

<u><em>Please don't use these answer's to cheat they are to help only.</em></u>

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