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The minimum number of numerically equal vectors whose vector sum can be zero is
Correct option is: (C) 2
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If A + B = A - B then vector B must be (A) zero vector (B) unit vector (C) Non zero vector (D) equal to vector A
Correct option is: (A) zero vector
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Equal parts of a flag pole are painted with saffron, white, and green colours. If one-third of the portion painted green is 2 m long, then find the le
Correct Answer - 18 m
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MN and PS are two equal chords of a circle drawn on either side of centre O of the circle . Both the chords are produced to meet at point A. If the ra
Correct Answer - 9 cm
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According to Newton’s third law of motion for every action there is equal and opposite reaction, why two equal and opposite
Forces of action and reaction always act on different bodies, hence they never cancel each other.
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Find the measure of an angle which is (i) equal to its complement, (ii) equal to its supplement.
Correct Answer - (i) `45^(@)` (ii) `90^(@)`
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if a convex lens has its ob j ect and image distance equal (say x) the focal length is equal to …………………
Correct option is B) x/2
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A solid cylinder and a solid cone have equal base and equal height. If the radius and the height be in the ratio of 4 : 3
Let the radius of both solids be r and their heights be h units, According to condition, \(\frac{r}{h}=\frac{4}{3}\\\therefore h=\frac{3r}{4}\) TSA of cylinder = \(2\pi r(r+h)\) TSA of cone = \(\pi r (r+l)\) On comparing the ratios, \(=\frac {2\pi r...
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Rehman is making a wheel using spokes. He wants to fix equal spokes in such a way that the angles between any pair of consecutive spokes are equal.
A table of the given information is as follows Number of spokes 4 6 8 10 12 Angle between a pair of consecutive spokes 90° 60° x1 x2 x3 From the given table, we obtain 4 × 90° = 360° = 6 × 60° Thus,...
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i. The amount of water vapour in air is determined in terms of its………….. ii. If objects of equal masses are given equal heat
i. The amount of water vapour in air is determined in terms of its absolute humidity. ii. If objects of equal masses are given equal heat, their final temperature will be different. This...
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