The primary energy source in the US is fossil fuels, such as coal and oil. Hydroelectic and solar are very very small in comparison (about 10 to 15 times less of those is used than fossil fuels).
Spain was once the World’s most powerful country. By the 20th century it was a poor and backward country where corruption was rife. It had lost nearly all of its overseas possessions (e.g. Cuba, the Philippines) and great extremes of wealth and poverty caused severe social tensions. Industry was confined mainly to Barcelona and the Basque country. Spaniards were divided on the type of government that they wanted. Monarchists were conservative and Catholics and did not want to reform Spain. Those who wanted a republic were anti-clerical and hoped to reform Spanish society. There were a number of areas where it was felt reform were needed:
Answer: (1) visible light, with wavelengths between 0.4 and 0.8 micrometre, (2) ultraviolet light, with wavelengths shorter than 0.4 micrometre, and (3) infrared radiation, with wavelengths longer than 0.8 micrometre.
Explanation: <em>hope that helps :p</em>
Interest is what it is called