Energy loss Definition and 153 Threads

I am climbing 1600 flights of stairs . Total height climbed is 1000ft. I weigh 60 kgs. What is the energy loss in calories? To lose the same amount of energy how long I have to walk on a flat surface at 5 Km per hour? Thank you Reena

I have a question I hope someone can help me with. Does light ever spontaneously lose energy? What I mean is, would, say, an infrared wave be traveling along and suddenly shift to microwave radiation, and maybe later to a radio wave, without any outside influences having affected it? If...

Here I go... I think the world would be better if more of it's inhabitants do what they think is best for all of it's inhabitants overall.I think this would lead to a huge decrease of mistreatment of living beings. This could be for example the murder of animals for their meat instead we might...