This is thebasis of all measurement of length. Every description of the scene of an event or of the position of an object in space is based on the specification of the point on a rigid body (body of reference) with which that event or object coincides. This applies not only to scientific description, but also to everyday life.
Cost Factors. Replacing a window costs an average of $300 to $700 per window. This assumes that the replacement window is going into an existing and structurally sound frame on a ground floor. Replacing windows in a typical three-bedroom, single-story home with ten windows can cost from $3,000 to $7,000.
How much does it cost to install or replace windows? Windows are an integral part of every home. They let in sunlight and air, and provide a view to the outdoors. No window lasts forever, though, and it's common to need to replace your windows roughly every 20 to 25 years, if not sooner.