from SI import joule

#
# Definitions of common energy units
# Data taken from Appendix F of Halliday, Resnick, Walker, "Fundamentals of Physics",
#     fourth edition, John Willey and Sons, 1993


Btu = 1055 * joule
erg = 1e-7 * joule
foot_pound = 1.356 * joule
horse_power_hour = 2.685e6 * joule

calorie = 4.186 * joule
Calorie = 1000 * calorie
kilowatt_hour = 3.6e6 * joule

electron_volt = 1.602e-19 * joule