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.
Bruce Travis McGill is an American actor. He is perhaps best known for his work with director Michael Mann in the movies The Insider, Ali, and Collateral. McGill's other notable film roles include Daniel Simpson D-Day Day in John Landis' Animal House, Com. Matuzak in Timecop, Reverend Larson in Shallow Hal, Gene Revell in The Sum of All Fears, and Lt. Brooks in Ride Along and its sequel Ride Along 2. Bruce McGill's television roles include Jack Dalton on MacGyver and Det. Vince Korsak on Rizzo