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.
Options for Interior Doors: 1 Note that wooden doors are pine species. Masonite is also commonly referred to as 'hardboard' or 'molded' surface. Also, hollow core doors are integrated among the Low price figures while solid core are among the High numbers. The flush door slab (veneered) is only considered among the lower priced materials of wooden doors. 2 Factory bored normally adds about $5 to the cost of the new door as a stock item.