For at least the last 100 years, sea level has been rising at an average rate of about 1.8 mm (0.1 in) per year. Most of this rise can be attributed to the increase in temperature of the sea and the resulting slight thermal expansion of the upper 500 metres (1,640 feet) of sea water.recise determination of a mean sea level is a difficult problem because of the many factors that affect sea level. Sea level varies quite a lot on several scales of time and distance.
Depreciation is very much necessary for fixed assets because the fixed asset would lose its residual value due to the wear and tear, depletion, passage of time, obsolescence or accidents over a time period. Therefore, the actual value of the asset cannot be determined if we take the purchase amount in the books every year.
Fixed Assets less Accumulated Depreciation. Fixed assets is the all-inclusive term for the wide range of long-term operating assets used by a business â from buildings and heavy machinery to office furniture. Except for the cost of land, the cost of a fixed asset is spread over its estimated useful life to the business; the amount allocated to each period is called depreciation expense.