While a quick Google search for the PDF may return link-filled websites (often of dubious legality), here are ways to get the digital version:
If you're interested in accessing the PDF version of "3000 Solved Problems in Physics", there are several options available: 3000 solved problems in physics -schaum outline series- pdf
Density, pressure, heat transfer, gas laws, and laws of thermodynamics. While a quick Google search for the PDF
Notice how certain principles (like conservation of energy) are applied to different situations. Conclusion there are several options available: Density