яна7933
02.01.2020 19:51

1. На каком расстоянии расположены два шарика, если их масса 10кг и 25 кг, а сила их взаимодействия 24,18*10-12(10 в минус 12 степени).
2. Расстояние между центрами шариков 12 метров. Шарики притягиваются друг к другу с силой 53,34*10-10 Н(10 в минус 10 степени). Масса первого шарика 56 кг. Найти массу Другого шарика.

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Ответ:
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30.12.2020 13:19

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Ответ:
Kosty12541
01.03.2022 06:08

1. по закону электролиза I=k*m*dt , где I-сила тока, k-электрохимический эквивалент данного вещества m-масса выделившегося на катоде вещества dt-время прохождения тока через электролит 

выведем электрохимический эквивалент k=I/(m*dt)=... 
надо перевести граммы в килограммы, минуты в секунды, тогда k будет иметь единицы измерения А/(кг*с)

 

ИЛИ 

 

По закону Фарадея M = k·I·t. 
Подставляя числовые данные, приведя их в систему СИ, мы получаем-
0.0015 = k·4·20·60 
ответ: k = 3.125·10^-7

 

2. Электрохимический эквивалент серебра равен 1.12*10^-6 Кг/К.

При серебрении изделий пользовались током I= 5А в течении t=15мин=900c.Какое количество серебра израсходовано за это время?Электрохимический эквивалент серебра равен k=1.12*10^-6 Кг/Кл. (в ответах написано : 0, 005 кг)

 

формула для 2 закона Фарадея

m=kIt=1.12*10^-6*5*900 =0.005040 кг= 0, 005 кг

ответ = 0, 005 кг

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