Which renewable source of energy should the united states focus its research and development efforts to make this source of energy our country’s main energy source by the year 2050? why?

Nuclear energy is produced by nuclear reactions that release the nuclear energy for generating heat, this heat is used to run steam turbines for producing electricity. There are three types of nuclear reactions Nuclear decay, Nuclear fusion and Nuclear fission.

Nuclear fission is utilised in the nuclear reactions. Research is still going on to develop techniques to harness the nuclear Fusion for electricity production. Although nuclear reactors are good source of energy but the materials used in the nuclear plants are non renewable(e.g radioactive elements). The disposal of radioactive materials produced during the Nuclear fission is not easy. So the states should focus on developing the solar energy as the main source of energy. Solar energy is renewable source and doesn't produce any waste products.

hello,

answer: a federal government has final authority on interstate/inter provincial  and international affairs, a confederation is one where the central/national government or authority is governing body what does not have final say over the same matters. hopefully this and i will try again if you don't like this answer : )

best of luck!

the arab empire adopted the muslim religion as their main belief. arabs would influence the people from the territories they invaded towards islam (the muslim belief).

nevertheless, throughout the history of the arab empire, rulers brought intellectual individuals from other religions to their centers of learning. these other foreigners included jews, christians, greeks, persians, and indians.   these resulted in the adoption of important knowledge developed by these cultures by the arabic empire. for example, the works of aristotle were translated from greek to arab and indian scientists brought the numerical concept of "zero" to the arabs.

nowadays, 93% of the arab population is muslim, which at the same time is subdivided in sects including the sunni, zaini, alawi, shia. the remaining 7% is composed mainly of christians.