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svetoff [14.1K]
3 years ago
6

The Pacific plate collides with and is subducted under four other crustal plates. The area where this happens has lots of volcan

ic activity. This area is called the _____.
Physics
2 answers:
snow_lady [41]3 years ago
8 0
The Pacific Ring of Fire.
Sveta_85 [38]3 years ago
5 0
The Pacific plate collides with and is subducted under four other crustal plates. The area where this happens has lots of volcanic activity. This area is called the Ring of Fire. This is a place under the Pacific Ocean and it has numerous volcanic eruptions and earthquakes and so this region is called the Ring of Fire. In this place there are about 450 active and dormant volcanoes and it is almost 75 percent of the volcanoes present in our earth.



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A convex lens has a focal length of 16.5 cm. Where on the lens axis should an object be placed in order to get a virtual, enlarg
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Answer:

Object should be placed at a distance, u = 7.8 cm

Given:

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v = - 1.90u

To calculate the object distance, u by lens maker formula given by:

\frac{1}{F} = \frac{1}{u}+ \frac{1}{v}

\frac{1}{16.5} = \frac{1}{u}+ \frac{1}{- 1.90u}

\frac{1}{16.5} = \frac{1.90 - 1}{1.90u}

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u = 7.8 cm

Object should be placed at a distance of 7.8 cm on the axis of the lens to get virtual and enlarged image.

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