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mel-nik [20]
3 years ago
9

Electromagnetic waves differ fundamentally from either water or sound waves because they

Physics
1 answer:
stepladder [879]3 years ago
8 0
<span>Electromagnetic waves differ fundamentally from either water or sound waves because they does not require any medium, they can travel in free space (vacuum) 

Hope this helps!</span>
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A graph shows how the temperature of a substance changes as energy is added steadily over time.
OlgaM077 [116]

Answer:

A flat, horizontal line  

Explanation:

A flat, horizontal line indicates a phase change.

The temperature does not increase because the added heat goes into converting one phase into another.

A is wrong. A downward-sloping line indicates that the temperature is decreasing with time.

C is wrong. An upward-sloping line indicates that the temperature is increasing with time.

8 0
3 years ago
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Why can you still see<br>the Moon during an<br>eclipse?​
love history [14]
During a total lunar eclipse, Earth completely blocks direct sunlight from reaching the Moon. The only light reflected from the lunar surface has been refracted by Earth's atmosphere. ... Due to this reddish color, a totally eclipsed Moon is sometimes called a blood moon.
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4 years ago
A marketing executive is investigating whether this year’s advertising campaign has resulted in greater mean sales compared with
djverab [1.8K]

We make use of a one-sample t-test for a population mean.

One-sample t-test for a population mean

Option B

<h3> Sample mean and Sample standard deviation</h3>

A Sample Standard Deviation is the root-mean square of the  data  minus the sample mean,

The sample mean is is the mean of the randomly selected sample

Therefore, For a data or sample where we have no information on population standard deviation and here only one sample group is compared, we make use of a one-sample t-test for a population mean

A one-sample t-test for a population mean

More on Probability

brainly.com/question/795909

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3 years ago
Ask a member of the family to help you.Do the following activities and identify the skill/skills being excited . use a separate
Archy [21]

Answer:

Ok. Thanks.

I'll try it out.

3 0
3 years ago
A driver followed a man with a surfboard strapped on top. The driver claims that the van stopped so quickly that the surfboard f
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It is not possible because if they stop so quickly the surfboard with the motion forward continuing the motion of the van, not backwards

This isn’t the greatest, but I hope it helps
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