1) How much energy AE (in joules) a person of 70 kg will have to spend,...

 

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1) How much energy AE (in joules) a person of 70 kg will have to spend, as he climbs the stair way, to go up 30 m? (You can take g 10 m/s.) 2) How much water could be heated up with this energy, as much as 1 degree Celsius? Recall that, to heat up 1 g of water for 1 degree Celsius, one needs about 4 calories, and I Calorie-4 Joules. 1) How much energy AE (in joules) a person of 70 kg will have to spend, as he climbs the stair way, to go up 30 m? (You can take g 10 m/s.) 2) How much water could be heated up with this energy, as much as 1 degree Celsius? Recall that, to heat up 1 g of water for 1 degree Celsius, one needs about 4 calories, and I Calorie-4 Joules.