Answer: This image is the answer to this question.
Explanation:
Answer:
A
Explanation:
B describes a strong base, C just isn't true there are only 7 strong acids, D describes a weak acid
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Answer</h2>
2.626984127 m
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Explanation:</h2><h2>
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You have to know the equation that relates wavelength, frequency, and velocity (it's like speed but a bit different).
v = f x λ
where:
v = velocity
f = frequency
λ = Wavelength
Rearrange to make λ subject:
λ = v / f
We've been given 331 as the speed, 126 as the frequency. Sub it into the equation:
331 / 126 = 2.626984127 m
Iron bending is just a physical change because the iron has only changed shape but there is no new substance. Iron rusting is a chemical change because there is a new substance which is rust.
