It has something to do with the minerals in their ground.
Answer:
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The following SEVEN (7) countries surround Poland:
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1) the Czech Republic; [south of Poland];
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2) Slovakia; [south of Poland];
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3) Belarus; [east of Poland];
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4) Ukraine; [east of Poland];
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5) Germany; [west of Poland];
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6) part of Russia —specially, the province of Kaliningrad Oblast;
[northeast of Poland];
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7) Lithuania; [northeast of Poland].
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An object moving in a circle is accelerating, even if it moves with a constant speed because the velocity changes.
<u>Explanation:</u>
The direction of an object changes constantly during its movement in circle at a constant speed. As the direction changes it results in changing the velocity of that object. This happens since velocity has direction and magnitude.as it is vector quantity.
An object will have acceleration only if a resultant force is acting on that body. When an object is moving in a circle, this resultant force is the centripetal force that is acting towards the center of the circle.
