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mario62 [17]
3 years ago
7

What are the disadvantages and advantages for electromagnetic spectrum​

Physics
1 answer:
Basile [38]3 years ago
3 0

Answer:

Advantages: In small quantities they help your body produce vitamin D.

Disadvantages: They can cause sunburn or even skin cancer if used in large quantities.

Explanation:

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What is the oscillation period of your eardrum when you are listening to the A4 note on a piano (frequency 440 Hz)?
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The period is the inverse of the frequence:

T=\dfrac{1}{f}=\dfrac{1}{440}=0.0022\overline{72}

4 0
3 years ago
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What do you need to know to establish motion
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An object is in motion if it changes position relative to a reference point.

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MissTica

Answer:

Newton's second law states that when a body of mass m is accelerated with force f

then F=ma

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3 years ago
A brick with a mass of 20 kg and a weight of 196 N is released on a frictionless plane at an angle of 30°. What is the accelerat
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Basically answer A

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3 years ago
The histogram below shows the number of downloads of a song over time.
Allisa [31]

Given data:

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  • A diagram consists rectangles, whose area is proportional to frequency of a variable and whose width is equal to the class interval.
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<em>From Figure:</em>  

        Each box in the graph (small rectangle box) is assumed to be one download. So, in the graph the time between 8 p.m to 9 p.m, the number of downloads are 8.75 approximately (because the last box is incomplete, therefore 8 complete boxes and 9th is more than half).

<em>So, We conclude that the total number of downloads are approximately 9 in the time span of 8 p.m. to 9 p.m.</em>

7 0
2 years ago
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