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A sound wave has a frequency of 500 Hz. The sound wave has a wavelength of 0.34 m in air. Calculate the speed of the sound wave in air?

As we know so far, c = f / λ. This equation comes from a much simpler version of speed = distance/ time. As the λ (with units "m") can be seen as distance and the frequency (with units "1/s&qu...
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Answered by Reni A. • Physics tutor
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Describe chemical test/s you could use to determine the identity of a carbonyl compound.

Use Brady's Reagent (2,4-DNPH) to test for the presence of the C=O bond in a carbonyl compound. The formation of a yellow precipitate indicates a positive test result. Then determine the melting point of the...
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Answered by Megan B. • Chemistry tutor
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When should you use the passé simple instead of the imparfait?/Quand devrais-tu utiliser le passé simple à la place de l'imparfait?

The passé simple is used to describe an action that belongs exclusively in the past and was not a habit, as in it happened only once in the past; whereas the imparfait is used to decribe an action that happe...
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Answered by Arthur B. • French tutor
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How do I differentiate something in the form f(x)/g(x)?

To differentiate the quotient of two functions f(x)/g(x) you can use the quotient rule, the formula of which is: (f'(x)*g(x)-f(x)*g'(x))/g 2 (x) it is important to remember which part you have to differentia...
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Answered by Riccardo P. • Maths tutor
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Solve 5x - 7 = 3x + 2, to find the value of x

x = 4.5 Rearrange the equation, so that like terms are on the same side: 5x - 3x = 2 +7 2x = 9 Then to find x, divide 9 by 2 x = 4.5
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Answered by Suzy A. • Maths tutor
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