Current produced by thermocouples. My understanding is that the thermocouple voltage is strictly a function of the temperature. Apparently this is called the Seebeck Voltage. Like any voltage source there is an internal resistance associated with it due to real world effects.
HIV/AIDS. Condoms for HIV prevention. Condoms, when used correctly and consistently, are highly effective in preventing HIV and other sexually transmitted infections (STIs). A large body of scientific evidence shows that male latex condoms have an 80% or greater protective effect against the sexual transmission of HIV and other STIs.
Abstinence is the only sure way to prevent pregnancy and sexually transmitted diseases (STDs). Every other method of birth control carries some risk of both. Teens who do decide to have sex have a variety of choices to reduce the risk of unwanted pregnancy.Condoms are among the most popular methods of birth control, but if not used consistently and when used incorrectly they carry a relatively high risk of failure.Latex condoms are the only form of protection that can stop transmission of HIV and can prevent pregnancy.Other means, including hormonal methods such as birth control pills, barrier methods like IUDs (intrauterine devices) or diaphragms and spermicides, require a visit to your health care provider.ondoms are among the most popular methods of birth control, but if not used consistently and when used incorrectly they carry a relatively high risk of failure. Latex condoms are the only form of protection that can stop transmission of HIV and can prevent pregnancy.