1. The problem is to evaluate $\log 10$. 2. Recall that $\log$ without a base usually means $\log_{10}$, the logarithm base 10. 3. The logarithm $\log_{10} x$ answers the question: "To what power must 10 be raised to get $x$?" 4. Here, we want to find $y$ such that $10^y = 10$. 5. Since $10^1 = 10$, it follows that $\log 10 = 1$. 6. Therefore, the value of $\log 10$ is $1$.