When striking, the pike, a predatory fish, can accelerate from rest to a speed of 4.2 m/s in 0.12 s ?

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What is a good example of instantaneous speed

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=