Imac g5 fan seems to run on high all the time now

My imac all the sudden started running at warp speed lately, is there some way i can check something to find out why the fan runs at almost full blast while doing normal stuff?
safari open and mail and maybe itunes but not playing anything causes a loud fan whine
thanks

Is Spotlight running? You can tell by the little white dot in the middle of its magnifying glass.
To remove an application entirely, I use AppZapper, and generally do a follow up in Spotlight, although I have found that is has usually removed any trace of the deleted app.
Miriam

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                        SyncServicesAgent:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                        Open XML for Excel:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
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                        Microsoft Database Daemon:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
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                        Microsoft Clip Gallery:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
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                        Microsoft PowerPoint:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                        Microsoft Excel:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                        Microsoft Outlook:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                        Microsoft Word:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
                        Microsoft Document Connection:          Version: 14.3.9 - SDK 10.5 3rd-Party support link
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                        Macintosh HD: Disk size: 464.96 GB Disk used: 277.71 GB
              Destinations:
                        Time Machine Backups [Local] (Last used)
                        Total size: 931.19 GB
                        Total number of backups: 14
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                                  Backup size 931.19 GB > (Disk used 277.71 GB X 3)
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                   2%          EtreCheck
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              894 MB          Free RAM
              969 MB          Active RAM
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