Many different types of energy can be converted into heat energy. Light, electrical, mechanical, chemical, nuclear, sound and thermal energy itself can each cause a substance to heat up by increasing the speed of its molecules. So, put energy into a system and it heats up, take energy away and it cools.
Alexander Alex Robert Hirsch (born June 18, 1985) is the creator and former executive producer of the American animated television series, Gravity Falls. He voiced two of the main characters, Grunkle Stan and Soos. He also voiced supporting and recurring characters such as: Old Man McGucket, Bill Cipher, the gnomes and many others.
Gravity Falls returning for season 3? Alex Hirsch hints at the possibility of 'comic or a special' episode. There is some good news for the fans of Gravity Falls, as show creator Alex Hirsh has hinted at the possibility of doing more episodes in the future. Dipper and Mabel Pines may return to the Mystery Shack for new adventures alongside Grunkle Stan and Ford Stan. Hirsch said the series might return with its third season.