In this articleÂ­, we will examine solar cells to learn how they convert the sun's energy directly into electricity. In the process, you will learn why we're getting closer to using the sun's energy on a daily basis, and why we still have more research to Â­do before the process becomes cost-effective.n this articleÂ­, we will examine solar cells to learn how they convert the sun's energy directly into electricity. In the process, you will learn why we're getting closer to using the sun's energy on a daily basis, and why we still have more research to Â­do before the process becomes cost-effective.
How long does a hen stay fertile after the rooster is gone?   A hen stays fertile for about 2-2 and a half weeks after the rooster is gone. The sperm stays in her for about that long, sometimes even up to 3 weeks. Started career as professional chef then a district sales manager for a wine & spirits company.
Depending on when the hen's last egg was laid, the next egg laid after the hen was mated will most likely be fertile. A rooster is necessary to have fertilized eggs, but a hen will lay eggs even if no rooster is present. Incubation time for fertilized eggs is 21 days.Days 1-18 require an internal temperature of 99.5 F and a humidity of 50-60%.epending on when the hen's last egg was laid, the next egg laid after the hen was mated will most likely be fertile. A rooster is necessary to have fertilized eggs, but a hen will lay eggs even if no rooster is present. Incubation time for fertilized eggs is 21 days.