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Question 1BiologySLPaper 1A

Water molecules contain polar covalent bonds due to unequal sharing of electrons. What is the result of this polarity?

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Step-by-step walkthrough

Step 1: Find the wavelength

Use the wave equation from the data booklet and rearrange it for wavelength.

360 = 300 λ

Step 2: Make a fraction

Now express the given separation as a fraction of a full wavelength.

0.30 \div 1.20

write as a fraction

\frac{d}{λ} = \frac{0.30}{1.20}

\frac{d}{λ} = 0.25

\frac{d}{λ} = \frac{1}{4} of a cycle

Step 3: Convert to phase

One complete cycle corresponds to $2 π$ radians, so take the same fraction of $2 π$ .

quarter of

2 π

Δ ϕ = \frac{1}{4} (2 π)

Δ ϕ = \frac{π}{2} rad

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