ï»¿ Two particles of masses m1,m2 move with initial velocities u1 and u2. On collision, one of the particles gets excited to a higher level, after absorbing energy (E). If final velocities of particles be v1 and v2, then we must have from Physics Work, Energy and Power Class 11 Manipur Board

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Two particles of masses m1,m2 move with initial velocities u1 and u2. On collision, one of the particles gets excited to a higher level, after absorbing energy (E). If final velocities of particles be v1 and v2, then we must have

C.

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Define watt.

Power is said to be one watt if one joule of work is done in one second.Â
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Is work a scalar or a vector quantity?

Work is dot product of two vectors. i.e.Â .

And dot product is a scalar quantity. Therefore, work is a scalar quantity.Â
1450 Views

What are different units of energy?

The different units of energy are :

(i) Joule Â  Â  Â  Â  Â  Â
(ii) Erg
(iii) eV Â  Â  Â  Â  Â  Â
(iv) KWh
(v) Calorie.

804 Views

Define the unit joule.

Work done is said to be one joule if one newton of Â force displaces the body through a distance of one meter in the direction of applied Â forceÂ .
799 Views

What is watt?

SI unit of power is Watt.Â
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