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In a tetrahedron, if two pairs of opposi...

In a tetrahedron, if two pairs of opposite edges are perpendicular to each other, prove that the third pair is also perpendicular and that the sum of the squares on the two opposite edges is same for each pair.

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MODERN PUBLICATION-VECTORS-Exercise
  1. In a tetrahedron, if two pairs of opposite edges are perpendicular to ...

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  2. Represent graphically a displacement of 40 km, 30^o west of south.

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  3. Represent the following graphically a displacement of : 40 km, 30^@ ea...

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  4. Represent the following graphically a displacement of : 40 km, 30^@ ea...

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  5. Classify the following measure as scalar and vector: 10 Kg

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  6. Classify the following measure as scalar and vector: 40^o

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  7. Classify the following measure as scalar and vector: 2 meters north-w...

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  8. Classify the following measure as scalar and vector:40watt

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  9. Classify the following measure as scalar and vector: 10^(-19)coulomb

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  10. Classify the following measure as scalar and vector: 20 m/s^2

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  11. Classify the following measures as scalars and vectors: 1000 cm^3

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  12. Classify the following measures as scalars and vectors: 10 N

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  13. Classify the following measures as scalars and vectors: 30 km/h

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  14. Classify the following as scalar and vector quantities: time period

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  15. Classify the following as scalar and vector quantities: distance

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  16. Classify the following as scalar and vector quantities: force

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  17. Classify the following as scalar and vector quantities: velocity

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  18. Classify the following as scalar and vector quantities:work done

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  19. In the figure identify the following vectors : Co-initial.

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  20. In the figure identify the following vectors : Equal.

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  21. A girl walks 4 km towards west, then she walks 3 km in a direction 30^...

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