Juan lost his job as a nuclear physicist working for a defense contractor. He can not find a job because no firms in the defense industry or any other industry are hiring people with his skills. Juan is unemployed.

Structural unemployment

Explanation:

Structural unemployment arises when workers are unable to find work because their skills do not match market requirements.  Structural unemployment cans result from changes in technology or unavailability of job openings that match the skills possessed by the unemployed population.

Juan's skills are irrelevant in the industry. No employer will be interested in her with her current training.  For Juan to find work, she needs to learn new skills.

muslims control the north africa during the period of 1500 up

to 1800. they made a barrier to prevent further european exploration from

entering the africa from the north. however, the dutch ware still able to move

toward the interior with having south africa as one of the routes leading to

the east for trading with asia.