To rationalize the denominator in the expression $\frac{7}{\sqrt{2}}$, you multiply both the numerator and the denominator by $\sqrt{2}$. This process eliminates the square root from the denominator. Let's perform the calculation:

$\frac{7}{\sqrt{2}} \times \frac{\sqrt{2}}{\sqrt{2}} = \frac{7 \cdot \sqrt{2}}{\sqrt{2} \cdot \sqrt{2}} = \frac{7\sqrt{2}}{2}$

So, the rationalized form of $\frac{7}{\sqrt{2}}$ is:

$\frac{7\sqrt{2}}{2}$

Would you like more details, or do you have any questions?

Here are 5 related questions you might consider:

1. How would you rationalize the denominator for $\frac{5}{\sqrt{3}}$?
2. What happens when you rationalize the denominator of $\frac{1}{\sqrt{5}}$?
3. How can you rationalize the denominator in the expression $\frac{4}{2\sqrt{2}}$?
4. What is the result of rationalizing the denominator of $\frac{6}{\sqrt{7}}$?
5. How would you simplify $\frac{9}{\sqrt{3}} \times \frac{\sqrt{3}}{\sqrt{3}}$?

Tip: Rationalizing the denominator is useful because it simplifies expressions and makes them easier to work with, especially when adding or subtracting fractions.