Question

Q.19-Q.26 answer fast pl.
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Answer 1

Answer:

4

Explanation:

its 4

Answer 2

Explanation:

1. poles are the two points which are variable on the surface of the earth which is pointed by magnetic needle.

2. the centre of the circle whose centre lies on the concave side of a curve on the normal to the given point of the curve and whose radius is equal to the curvature of the circle.

3. the radius of the circle which touches the curve at a given point and has the same tanget and curvature at that point is called radius of curvature.

4. each of three mutually perpendicular axes in a body about which the moment of inertia is at maximum is called principal axis. it is also known as optical axis.

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