If the specific gravity has a value of greater than one, then the object sinks in water and if it is less than one, then the object floats in water. If the specific gravity has a value equal to one, then the object will neither sink nor float. The specific gravity is a very important factor in different industries.
On average, your mattress should last anywhere between 8 to 10 years. However, there are a lot of elements that can increase or decrease the longevity of your mattress. Your mattress is an investment â the better you take care of it and the more money you put into it will increase the longevity of your mattress.
A: A futon can last as long as a conventional mattress, given the correct maintenance i.e. used on an appropriate slat base and turned regularly. As a rule of thumb, expect a futon to last 5-10 years. After this time futons can be reconditioned to an as-new feel.