6. what is the total number of calories lost when 10
grams of water at 80°c is cooled to 60°c?
a) 10 b) 20 c) 100 d) 200
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Ответ:
B
Explanation:
so you started out with 80
you have to cool it till 60
so it is decreasing which means you have to subtract
Note=if something is increasing or wanting to go up its addition but for this problem 60 is less then 80 so we are doing subtraction
80-60=20
Ответ:
87 ÷ 0.45
= 193.333… lbs
i don’t know how many significant figures you have to do but if it’s 3 significant figures then the answer is 193lbs
lbs = pounds