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If vecA = 2 hati + 3 hatj +hatk, vecB = ...

If `vecA = 2 hati + 3 hatj +hatk, vecB = 2 hati - 2hatj + 3 hatk`, calculate `abs(vecA xx vecB)`

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JBD PUBLICATION-Model Test Paper 13-EXERCISE
  1. Explain one use of dimesional analysis by giving an example.

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  2. The resistance R = Vil. If V= (100 +- 5) volt and I = (10 +- 0.2) A. F...

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  3. If vecA = 2 hati + 3 hatj +hatk, vecB = 2 hati - 2hatj + 3 hatk, calcu...

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  4. A force of 100 N is able rp produce an acceleration 8 m s^-2 in body o...

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  5. Explain conservative force with examples.

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  6. The net external torque on a system of particles about an axis is zero...

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  7. What is geostationary satellite ?Write its two applications.

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  8. If a person stands nera a fast moving train, there is a possibility of...

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  9. When a projectile os projected at an angle with the horizontal, find t...

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  10. A body travels 200 m in 2 seconds and 220 m in the next 4 seconds. Wha...

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  11. Write an expression for the centripetal force.

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  12. What clastic and inclastic collisions? Give one example of each and st...

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  13. The velocity of a car is doubled. Find the ratio of percentage increas...

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  14. Define orbital velocity. How is it related with escape velocity?

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  15. Determine excess of pressure in side liquid drop

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  16. Write the postilates of kinetic theory of gases.

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  17. What is an echo?

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  18. Derive an expressionfor total energy of a body at any instant.

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  19. Define wavelength of a wave.

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  20. Define wave motion.What are its characteristics?

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