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Консультация № 181199
10.12.2010, 11:37
0.00 руб.
0
2
1
Здравствуйте, уважаемые эксперты! Прошу Вас ответить на следующий вопрос:
При измерении коэффициента поверхностного натяжения спирта воспользовались бюреткой с диаметром отверстия 1,6 мм, закрепленной в вертикальном положении. Было отсчитано 100 капель общей массой 1,02 г. Вычислить значение коэффициента поверхностного натяжения спирта. Диаметр шейки капли принять равным диаметру канала трубки.
При измерении коэффициента поверхностного натяжения спирта воспользовались бюреткой с диаметром отверстия 1,6 мм, закрепленной в вертикальном положении. Было отсчитано 100 капель общей массой 1,02 г. Вычислить значение коэффициента поверхностного натяжения спирта. Диаметр шейки капли принять равным диаметру канала трубки.
Обсуждение
10.12.2010, 12:20
общий
Дано
D=1.6 мм=1.6*10-3м
n=100
m=1.02 г=1.02*10-3кг
Решение
Сталагмометрический метод основан на измерении массы капель Р, образующихся при вытекании жидкости из вертикальной трубки с радиусом выходного отверстия r. Расчет проводят по формуле (из уравнения Тейта)
[$963$]=mк*g/(2*pi*R)
R=D/2
mk=m/n
тогда
[$963$]=m*g/(pi*D*n)
[$963$]=1.02*10-3кг*9.8м/с2/(3.14*1.6*10-3м*100)=19.9*10-3 Н/м
D=1.6 мм=1.6*10-3м
n=100
m=1.02 г=1.02*10-3кг
Решение
Сталагмометрический метод основан на измерении массы капель Р, образующихся при вытекании жидкости из вертикальной трубки с радиусом выходного отверстия r. Расчет проводят по формуле (из уравнения Тейта)
[$963$]=mк*g/(2*pi*R)
R=D/2
mk=m/n
тогда
[$963$]=m*g/(pi*D*n)
[$963$]=1.02*10-3кг*9.8м/с2/(3.14*1.6*10-3м*100)=19.9*10-3 Н/м
Об авторе:
to live is to die
to live is to die
10.12.2010, 18:19
общий
это ответ
Здравствуйте, Ольга Дмитриевна!
Дано
D=1.6 мм=1.6*10-3м
n=100
m=1.02 г=1.02*10-3кг
Решение
Метод основан на измерении массы капель Р, образующихся при вытекании жидкости из вертикальной трубки с радиусом выходного отверстия R. Расчет проводят по формуле (из уравнения Тейта)
[$963$]=mк*g/(2*pi*R)
R=D/2
mk=m/n
тогда
[$963$]=m*g/(pi*D*n)
[$963$]=1.02*10-3кг*9.8м/с2/(3.14*1.6*10-3м*100)=19.9*10-3 Н/м
Дано
D=1.6 мм=1.6*10-3м
n=100
m=1.02 г=1.02*10-3кг
Решение
Метод основан на измерении массы капель Р, образующихся при вытекании жидкости из вертикальной трубки с радиусом выходного отверстия R. Расчет проводят по формуле (из уравнения Тейта)
[$963$]=mк*g/(2*pi*R)
R=D/2
mk=m/n
тогда
[$963$]=m*g/(pi*D*n)
[$963$]=1.02*10-3кг*9.8м/с2/(3.14*1.6*10-3м*100)=19.9*10-3 Н/м
5
Спасибо!
Об авторе:
to live is to die
to live is to die
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