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tankabanditka [31]
4 years ago
12

A pendulum swings back and forth 5 times in 10 seconds what is the period of the pendulum?

Physics
1 answer:
Ainat [17]4 years ago
4 0
Period is T = 1/f.  The frequency, f, is 5cycles/10s = 0.5.  So the period T=1/0.2 = 2.
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Find the wavelength of the balmer series spectral line corresponding to n = 15.
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Answer:

371.2 mm

Explanation:

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when n = 15

1/λ = 1.097 × 10⁷ m⁻¹(1/2² -1/15²)

    = 1.097 × 10⁷ m⁻¹(1/4 -1/225)

    = 1.097 × 10⁷ m⁻¹(0.25 - 0.0044)

    = 1.097 × 10⁷ m⁻¹ 0.245556

    = 2.693 10⁶ m⁻¹

So,

λ  = 1/2.693 10⁶ m⁻¹

    = 0.3712 10⁻⁶ m

    = 371.2 mm

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A large crate is at rest on a ramp at a loading dock
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