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.
WARNING: THIS BLOG CONTAINS SPOILERS!!!!! - You may not know this but the show that plays on Disney Channel and Disney XD, Gravity Falls, has a lot of secrets in it. That's why I made this blog. So people can learn more about the secrets of Gravity Falls.