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Firstly the values should be converted into more comfortable units. 0.42km/s = 420m/s, and 16kHz = 16,000Hz. Next, use the equation wavelength = speed/frequency This gives wavelength = 420m/s over 16,000/...

Divide 160 by 2 as many times as you can to get 80x2, 40x2x2, 20x2x2x2, 10x2x2x2x2, 5x2x2x2x2x2. Then re-write your answer so that it is 5x2^5. If you're struggling to divide by 2 and keep track of how ma...

First of all, you need to ask yourself the question: am I addressing one person, or more than one? If the answer is more then one, simple! You ALWAYS use vous because this is the plural form.

If th...

Aerobic respiration requires oxygen from the air, whereas anaerobic respiration does not. Aerobic produces Carbon dioxide and water, and the carbon dioxide exits through a gas exchange system in humans. A...

As we are considering a quadratic equation, we are looking for two values of x that make the equation equal to 0. To factorise, first look to the constant term (the term without any x) to find 2 numbers t...