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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
Related Questions: - Electrons of mass m with de-Broglie wavelength λ fall on the target in an X-ray tube.
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- The equations of motion of a projectile are given by x=36 t metre and 2y=96t-9.8t²
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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
- Electrons of mass m with de-Broglie wavelength λ fall on the target in an X-ray tube.
- Two parallel metal plates having charges +Q and -Q face each other at a certain
- The threshold wavelength for photoelectric emission from a material is 4800 Å.
- The equations of motion of a projectile are given by x=36 t metre and 2y=96t-9.8t²
- Three fourth of the active material decays in a radioactive sample in 3/4 sec
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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