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2 answers:
Answer : The correct option is (D) Centimeters per minute
Explanation :
Speed : It is defined as the distance traveled by the object per unit time.
The unit of distance are, kilometer, meter, centimeter etc.
The unit of time are, minute, second, hour etc.
Formula used :
From the given options, the correct measurement of speed is centimeters per minute.
Hence, the correct option is (D) Centimeters per minute
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Answer: If a hydrogen atom and a helium atom have the same kinetic energy then the wavelength of the hydrogen atom will be roughly equal to the wavelength of the helium atom.
Explanation:
The relation between energy and wavelength is as follows.
This means that energy is inversely proportional to wavelength.
As it is given that energy of a hydrogen atom and a helium atom is same.
Let us assume that . Hence, relation between their wavelengths will be calculated as follows.
... (1)
... (2)
Equating the equations (1) and (2) as follows.
Thus, we can conclude that if a hydrogen atom and a helium atom have the same kinetic energy then the wavelength of the hydrogen atom will be roughly equal to the wavelength of the helium atom.