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Alex17521 [72]
3 years ago
8

Billiard balls moving across a pool table is an example of _____ friction.

Physics
1 answer:
frozen [14]3 years ago
8 0
It is an example of rolling friction because balls roll.

Answer is ROLLING
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The Hi line of the Balmer series is emitted in the transition from n = 3 to n = 2 i.e. n_i=3 and n_f=2

The wavelength of Hi line of the Balmer series is given by :

\dfrac{1}{\lambda}=R(\dfrac{1}{n_f}-\dfrac{1}{n_i})

\dfrac{1}{\lambda}=1.09\times 10^7\times (\dfrac{1}{2}-\dfrac{1}{3})

\lambda=5.50\times 10^{-7}\ m

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