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marysya [2.9K]
3 years ago
9

Choose the word that BEST completes the following sentence. The sunspot cycle is a pattern of solar activity where the average n

umber of sunspots gradually _______________________________ and _______________________________.
Physics
1 answer:
anzhelika [568]3 years ago
7 0

Answer:

increases and decreases

Explanation:

the sunspot cycle is a period of time which varies from as short as nine years to as long as fourteen years where the number of sun spots on the sun increases at the beginning of the cycle and then decreases again towards the end of the cycle.

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A bullet of mass 20g is a fired with a velocity of 50mls from a gun of mass 2.5kg. Calculate the recoil velocity of the gun.​
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Answer:

v = - 0.4 m/s

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Light travels at 3. 0 × 108 m/s in a vacuum and slows to 2. 0 × 108 m/s in glass. What is the index of refraction of glass?.
Sergio039 [100]

The required value of the index of refraction of glass is 1.5.

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The speed of light in a vacuum is, c = 3.0 \times 10^{8} \;\rm m/s.

The speed of light in a glass is, v = 2.0 \times 10^{8} \;\rm m/s.

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Learn more about the index of refraction here:

brainly.com/question/17156275

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