As a Christian scientist, Dr. Bohlin is open to examining the theories of both young-earth and old-earth scientists to explain what we can observe today. The Grand Canyon provides an excellent venue to consider the theories of both groups on how the geological layers were formed and when this occured.
If the door is already attached, swing it open and closed to see how much inertia it has. An average hollow-core door usually weighs around 25 to 30 pounds, so if you can lift or swing the door with minimal effort, it is probably hollow-core. Solid-core doors are usually 25 to 30 pounds heavier than their hollow counterparts, so if the door has some heft to it, it's probably solid-core.
How to Tell If Your Door is Solid-Core. 1  Test the weight of the door. If it's new and you haven't hung it yet, see how easy it is to lift. 2  Look at the finish on the door. Factories seldom stain hollow-core doors, except for products that have finished, wood-veneer surfaces. 3  Examine the paneling on the door, if there is any.