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.
1 In fact some models will last as many as 15 years or more, and again this is because of the material used. 2  If you prefer a firmer mattress, latex might be the answer because although it will conform to your bodyâs natural curves, it wonât give you that âsinkingâ feeling that memory foam does.