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.
1 It can cost $200-$500 for a solid wood door, and $500-$1,000 or more for a more decorative interior door in high-end wood like walnut or mahogany. 2  For example, Lowe's store brand ReliaBilt 30. 3  Wide 6-Panel Hollow Composite Door Slab costs about $33. At Home Depot a set of Pinecroft 36x42 Wood Louvered Cafe Doors in clear, unfinished pine (must be painted or stained) costs $117; and Interior Doors Direct has a set of 36 high cafe doors for a 36 wide opening (two 18-wide swinging doors) with a two-panel design for $183 in poplar wood and $489 in walnut.