Question : Problem: Fan speed high and low continusly

I have a HP compaq nc6000 labtop the fan keeps disturbing me high and low continuasly. And is it possible to increas the RAM of this laptop iis now 512.

Answer : Problem: Fan speed high and low continusly

Here is the memory upgrade guide for this laptop. The slots are found under the keyboard.
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=130&prodSeriesId=367367&prodTypeId=321957&objectID=c00096797
The type of ram required is DDR333 as shown in the crucial page for this laptop
http://www.crucial.com/store/listparts.aspx?model=Business+Notebook+nc6000

As for the changing fan speeds, the CPU fan may need to be cleaned. Here is the service manual for this latop and it shows the disassembly procedures on page 5-32
http://h20000.www2.hp.com/bizsupport/TechSupport/CoreRedirect.jsp?redirectReason=DocIndexPDF&prodSeriesId=367367&targetPage=http%3A%2F%2Fh20000.www2.hp.com%2Fbc%2Fdocs%2Fsupport%2FSupportManual%2Fc00725201%2Fc00725201.pdf