Medals, awards, combat patch awarded while in the army, can these be worn on Air Force Uniforms?

Some can be. Personal awards (ie AAM's, ARCOM's, etc), campaign medals and permanently authorized unit awards transfer over. Some skill badges like Airborne, EFMB, aviator wings and the like can as well. However, combat patches don't (USAF doesn't use unit patches anymore) as well things like marksmanship and driving badges.

Awards Yes, patches No.

Generally Medals and Ribbons earned in one branch may be worn if joining another. Qualification badges, on the other hand are more restricted.