Answer:
The focal length of the given spherical mirror is 20cm.
Explanation:
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Answer:
Four fundamental forces are gravitational, electromagnetic, strong, and weak.
Explanation:
The gravitational and electromagnetic interactions, which produce significant long-range forces whose effects can be seen directly in everyday life and the strong and weak interactions, which produce forces at minuscule, subatomic distances and govern nuclear interactions.
Answer:
By holding another magnet close to it. If the object is attracted to the magnet, then it too is magnetic.
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