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wolverine [178]
3 years ago
6

Lol i'm going to fail please help

Physics
1 answer:
Novosadov [1.4K]3 years ago
6 0

Answer:

Explanation:

The frequency is 16.0 Hz. That means that 16 of these waves can pass a single point in 1 second. We are given frequency and wavelength. The equation that relates them is

f=\frac{v}{\lambda} where f is frequency, v is velocity, and λ is wavelength. Putting all this together:

16.0=\frac{v}{97.5} and solving for velocity,

v = 16.0(97.5) so

v = 1560 m/s. This wave can travel 1560 meters in a single second!!! Now that we know this velocity, we can use it in a proportion to find our unknown, which is how long, t, it will take to hear this sound 11000m away. (11 km is 11000m):

\frac{1560m}{1s}=\frac{11000}{t} and cross multiply to get

1560t = 11000 so

t = 7.1 seconds

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Sherlock Holmes examines a clue by holding his magnifying glass (with
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Distance: -30.0 cm; image is virtual, upright, enlarged

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We can find the distance of the image using the lens equation:

\frac{1}{f}=\frac{1}{p}+\frac{1}{q}

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\frac{1}{q}=\frac{1}{f}-\frac{1}{q}=\frac{1}{15.0}-\frac{1}{10.0}=-0.033\\q=\frac{1}{0.033}=-30.0 cm

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The magnification can be found as

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