To find the depth $d$ of a submerged object given the pressure $p$, we can use the formula:

$p = 64d$

Given that $p = 672$ pounds per square foot, substitute this value into the equation:

$672 = 64d$

Now, solve for $d$ by dividing both sides of the equation by 64:

$d = \frac{672}{64}$

$d = 10.5 \text{ feet}$

So, the depth of the submerged object is 10.5 feet.

Would you like further details or clarifications? Here are some related questions to consider:

1. How does pressure change with depth in general?
2. What factors influence water pressure apart from depth?
3. How can we calculate pressure in different liquids?
4. What is the relationship between pressure and force in fluids?
5. How does the density of the fluid affect pressure calculations?

Tip: Always ensure units are consistent when working with formulas. This avoids common calculation errors.