ASAP I’m timed on this so help would really be appreciated :)

Physics

1 answer:

Leni [432]3 years ago

5 0

We can’t help if it’s a test only for homework.

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What is the wavelength of an earthquake wave if it has a speed of 15 km/s and a frequency of 12 Hz?

Natasha2012 [34]

<h2>Answer: 1.25 km</h2>

Explanation:

The velocity $V$ of a wave is given by:

$V=\lambda.f$ (1)

Where:

$\lambda$ is the wavelength of the wave

$f$ is the frequency of the wave. Its unit is Hertz ( $1Hz=\frac{1}{s}$ )

So, we have to find $\lambda$ from equation (1):

$\lambda=\frac{V}{f}$ (2)

$\lambda=\frac{15km/s}{12Hz}$

Finally we obtain the wavelength of the earthquake wave:

$\lambda=1.25 km$

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3 years ago

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Alisiya [41]

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4 years ago

Which of the following conditions would decrease the ability of a person to hear a sound?

Korolek [52]

A wave loses energy as it moves through a medium.

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4 years ago

The momentum of an object is determined to be 7.2 x 10-3 cm kg x m/s. Express this as provided or use any equivalent unit. How i

Leno4ka [110]

Complete Question:

The momentum of an object is determined to be 7.2 × 10-3 kg⋅m/s. Express this quantity as provided or use any equivalent unit. (Note: 1 kg = 1000 g).

Answer:

7.2 gm/s.

Explanation:

Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

$Momentum = mass * velocity$