(a) At what Celsius temperature is the average kinetic energy of a helium gas atom equal to 6.21 × 10-21 J?

The Boltzmann constant is 1.38 × 10-23 J/K .
(b) What would be the temperature for radon gas?


(a) 27°C (b) 27°C

Physics & Space Science

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Thin Lenses: Is it possible to see a virtual image?

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Scientists hope that some day they will be able to produce a theory which will combine the strong force, the weak nuclear force, and electromagnetism. This theory has been called

A) The Grand Unified Theory. B) The Theory of Everything. C) The Unified Field Theory. D) The Electroweak Theory. E) The Electrostrong Theory.

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Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.You drop the box. As it falls to its original level, its kinetic energy is 100 J

a. True b. False Indicate whether the statement is true or false

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Monochromatic light of wavelength 500 nm is incident normally on a grating. If the third-order maximum of the diffraction pattern is observed at 32.0°, how many total number of maxima can be seen?

A) 5 B) 7 C) 10 D) 11 E) 13

Physics & Space Science