One way to categorize waves is to say that there are longitudinal and transverse waves. In a transverse wave, particles of the medium are displaced in a direction perpendicular to the direction of energy transport. In a longitudinal wave, particles of the medium are displaced in a direction parallel to energy transport.
Seven plans allowed normal retirement within these ages. Six of them required at least 30 years of service for normal retirement. Only two of the plans continue to allow normal retirement within these ages. Both now require a minimum age of 57 and at least 30 years of service. For most plans the minimum age requirement increased to the range of age 60 to age 62. Age 60.
Age requirements differ between branches of service, but in general you must be between the ages of 17-42 with no prior service (NPS). Note: Seventeen year olds need parental consent. Or between the ages of 17 and 59 for those with prior service (PS) and are able to complete 20 years of creditable service for retirement by age 60. Take and pass the Armed Services Vocational Aptitude Battery (ASVAB) test. Pass an Armed Forces Physical Examination. Must be available for initial active duty training. Must agree to participate in an initial tour of active duty training of at least 12 weeks. Top > Types of Status in the Reserve and National Guard.