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.
The accumulated depreciation account is an asset account with a credit balance (also known as a contra asset account); this means that it appears on the balance sheet as a reduction from the gross amount of fixed assets reported.or example, ABC International buys a machine for $100,000, which it records in the Machinery fixed asset account. ABC estimates that the machine has a useful life of 10 years and will have no salvage value, so it charges $10,000 to depreciation expense per year for 10 years.