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Six molecules have speeds 2 units, 5 units, 3 units, 6 units, 3 units and 5 units respectively. The rms speed is
Options
(a) 4 units
(b) 1.7 units
(c) 4.2 units
(d) 5 units
Correct Answer:
4 units
Explanation:
v(rms) = √[(v₁² + v₂²+ ……. + v(n)²) / n] = √[(4+25+9+36+9+25) / 6]
= √(108 /6) = √(18) = 3 √2 = 3 × 1.414 = 4.242 units
i.e. 4 units is the approximately correct answer
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Topics: Behavior of Perfect Gas and Kinetic Theory
(34)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A solid sphere, a hollow sphere and a ring are released from top of an inclined
- The velocity of a particle at an instant is 10 ms⁻¹.After 3 s its velocity will become
- A straight conductor 0.1 m long moves in a uniform magnetic field 0.1 T.
- A particle of mass m moves with constant speed along a circular path of radius r under
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Topics: Behavior of Perfect Gas and Kinetic Theory (34)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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