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anyanavicka [17]
2 years ago
8

Calculate the speed for a car that went a distance of 125 kilometers in 2 hours​

Physics
1 answer:
Llana [10]2 years ago
4 0
125/2

125 divided by 2 is 62.5
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Dolphin echolocation is similar to ultrasound. Reflected sound waves
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Waves with high frequencies have shorter wavelengths that work better  than low frequency waves for successful echolocation.

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To understand why high-frequency waves work better  than low frequency waves for successful echolocation, first we have to understand the relation between frequency and wavelength.

The relation between frequency and wavelength is given by

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Since the speed of light is constant, the wavelength and frequency are inversely related.

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\displaystyle \rho=1.25\ g/ml

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<u>Density </u>

The density of a substance is the mass per unit volume. The density varies with temperature and pressure.

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\displaystyle \rho=\frac{m}{V}

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\displaystyle \rho=\frac{3.75\ g}{3\ ml}

\boxed{\displaystyle \rho=1.25\ g/ml}

Since 1 kg=1000 mg and 1 lt = 1000 ml, the density has the same value but with different units:

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