Question

Zakazagona20 12 часов назад Физика студенческий Три одинаковых металлических шарика зарядили разноимёнными зарядами, которые равны −60q, 71q и Xq (X — неизвестное число). После этого шарики привели в соприкосновение, а потом развели в разные стороны. После выполнения всех указанных действий заряд третьего шарика равен 18q. Чему равны заряды первого и второго шарика после выполнения всех указанных действий? Чему был равен заряд третьего шарика в начале эксперимента? При записи ответа (если получается отрицательное число) не забудь поставить перед ним знак «-» без пробела! Если ответ является положительным числом, то никакой знак ставить не нужно! Заряд первого шарика после всех указанных действий равен q. Заряд второго шарика после всех указанных действий равен q. Заряд третьего шарика в начале эксперимента равен q.

Answer 1

Закон сохранения зарядов  

Суммарный заряд распределился поровну на 3 шарика  

-60q + 71q + xq=3 * 18q  

х=18*3 +60 - 71  

х= +43  

Ответ: 18q; 18q; 43q.

Answer 2

Problem Analysis

We are given three identical metallic spheres that are charged with different charges: -60q, 71q, and Xq (where X is an unknown number). The spheres are brought into contact with each other and then separated. After these actions, the charge on the third sphere is 18q. We need to determine the charges on the first and second spheres after these actions, as well as the initial charge on the third sphere.

Solution

Let's denote the charges on the first, second, and third spheres as q1, q2, and q3, respectively.

According to the law of conservation of charge, the total charge before and after the spheres are brought into contact should be the same.

Before the spheres are brought into contact, the total charge is the sum of the individual charges on each sphere:

q_total_before = q1 + q2 + q3

After the spheres are brought into contact, they will distribute the charges equally among themselves. Therefore, the charges on the first and second spheres will be equal to the average of their initial charges:

q1_after = (q1 + q2 + q3) / 3 q2_after = (q1 + q2 + q3) / 3

After separating the spheres, the charge on the third sphere is 18q. Therefore, we have:

q3_after = 18q

Now, we can solve the equations to find the values of q1, q2, and q3.

From the equation q1_after = (q1 + q2 + q3) / 3, we can substitute q1_after with q and simplify:

q = (q1 + q2 + q3) / 3

Multiplying both sides of the equation by 3, we get:

3q = q1 + q2 + q3

From the equation q3_after = 18q, we can substitute q3_after with 18q and simplify:

18q = q3

Now, we have two equations:

3q = q1 + q2 + q3 18q = q3

We can substitute the value of q3 from the second equation into the first equation:

3q = q1 + q2 + 18q

Simplifying the equation, we get:

3q - 18q = q1 + q2

-15q = q1 + q2

Now, we have one equation with two unknowns. However, we can't determine the exact values of q1 and q2 without additional information. We can only express them in terms of q.

Therefore, the charges on the first and second spheres after the actions are q1 = -15q and q2 = -15q, respectively.

The initial charge on the third sphere is q3 = 18q.

To summarize: - The charge on the first sphere after the actions is -15q. - The charge on the second sphere after the actions is -15q. - The initial charge on the third sphere is 18q.

Please note that the values of q1 and q2 are expressed in terms of q, and we cannot determine their exact values without additional information.

Let me know if you need any further assistance!