Given that the a power of 10 = radical 2, the B power of 10 = 4 root 8, find the 2B power of 2a-3 molecule of 10

Given that the a power of 10 = radical 2, the B power of 10 = 4 root 8, find the 2B power of 2a-3 molecule of 10

2a-3 of 10 to the power of 2B = (a power of 10) to the square / (B power of 10) to the power of 2 of 3
= 2 / radical 2 = radical 2

(radical 27a-a radical 3 / a) - (3 times radical 3 / A + 2A / 1 times radical 75A)

The solution is a > 0 [√ (27a) - √ (3 / a)] - [3 √ (A / 3) + √ (75A & # 179;) / (2a)] = [3 √ (3a) - √ (3a) / a] - [3 √ (3a) / 3 + 5A √ (3a) / 2A] = 3 √ (3a) - √ (3a) / a - √ (3a) - (5 / 2) √ (3a) = (- 1 / 2) √ (3a) -

To move the positive charge of 1 * 10 Coulomb to point a in the electric field from infinity, we need to overcome the power joule of 1 * 10 Coulomb
The question is that what the title tells you is only the amount of charge, not the amount of charge. The direction of displacement and force is opposite. Why can't it be that the field source charge is negative and the charge is negative or the field source charge is positive and the charge is positive? So the second question has two answers

It is generally believed that the amount of charge is the amount of electricity. Besides, the topic has clearly stated that "the positive charge of - 8 Coulomb with the amount of charge of 1 * 10" and "moving to point a in the electric field at infinity, we need to overcome the electric field force to do work", so there is no case that "the field source charge is negative, and the charge is also negative"

When a point charge with a power of 5x10 to the negative 7th is placed in an electric field, the electric field force is 3x10 to the negative 4th power n. if a point charge with a power of 2x10 to the negative 7C is placed in the same position, what is the electric field force and the electric field strength of the point?

F = QE, so e = f / Q = 3x10 ^ - 4 / 5x10 ^ - 7 = 60N / C
If a point charge of 2x10 minus 7C is placed at the same position, the electric field force F1 = EQ1 = 60x2x10 ^ - 7 = 1.2x10 ^ - 5N
Electric field strength e = 60N / C