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: Disney XD TV Series Ending with Season Two But Not Cancelled by Trevor Kimball, November 22, 2015 There wonât be a third season of Disney XDâs animated mystery series, Gravity Falls. The series is coming to an end but the showâs creator, Alex Hirsch, says that it wasnât cancelled. It was apparently his decision to bring the story to a close after two seasons. The penultimate episode, titled âWeirdmageddon II: Escape from [â¦]