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.
Depreciation has nothing to do with the market value of a fixed asset, which may vary considerably from the net cost of the asset at any given time. Depreciation is a major issue in the calculation of a company's cash flows, because it is included in the calculation of net income, but does not involve any cash flow.hen you record depreciation, it is a debit to the Depreciation Expense account, and a credit to the Accumulated Depreciation account. The Accumulated Depreciation account is a contra account, which means that it appears on the balance sheet as a deduction from the original purchase price of an asset.