1 / 4

1 Calorie : energy needed to heat 1 g of water by 1 o C 1 Calorie = 4.182 Joules ≈ 4.200 J

1 Calorie : energy needed to heat 1 g of water by 1 o C 1 Calorie = 4.182 Joules ≈ 4.200 J 1 C (or food calorie or KILO calorie) = 4200J. BTU (British Thermal Unit) Energy needed to heat 1 lb of water by 1 o F… 1 BTU = 1055 Joules ≈ 1 kiloJ.

aren
Télécharger la présentation

1 Calorie : energy needed to heat 1 g of water by 1 o C 1 Calorie = 4.182 Joules ≈ 4.200 J

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 1 Calorie : energy needed to heat 1 g of water by 1oC 1 Calorie = 4.182 Joules ≈ 4.200 J 1 C (or food calorie or KILO calorie) = 4200J BTU (British Thermal Unit) Energy needed to heat 1 lb of water by 1oF… 1 BTU = 1055 Joules ≈ 1 kiloJ

  2. Guess: how much energy is there in a pound of an explosive, such as dynamite or TNT, compared to, say, a pound of chocolate chip cookies? Object Energy in one gramCompared to TNT Calories Joules Bullet (moving at speed of sound) 0.01 40 0.015 Battery (flashlight) 0.01  40 0.015 Battery (computer) 0.1 400 0.15 TNT (trinitrotoluene) 0.651 2723 1 Modern High Explosive (PETN) 1  1.6 Chocolate Chip Cookies 5 21 kJ 8 Butter 7 29 kJ 11 Gasoline 10 42 kJ 15 Methane gas (CH4) 13 54 kJ 20 Hydrogen gas (H2) for fuel cell 26 110 kJ 40 Asteroid or meteor (30 km/sec) 107 450 kJ 165 Uranium-235 20 million Ca l84 billion J 30 million   http://muller.lbl.gov

More Related