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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
- The e.m.f. of a battery is 2 V and its internal resistance is 0.5 Ω. The maximum
- The root mean square speed of oxygen molecule (O₂) at a certain temperature is v.
- When light of wavelength 300 nm falls on a photoelectric emitter,
- A device which converts electrical energy into mechanical energy is
- Surface tension of a solution is 30 x 10⁻² N/m. The radius of the soap bubble is 5 cm
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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