Making a pancake from batter is an example of a chemical change.

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**Answer:**</h2>

(a) 6.95 x 10⁻⁸ C

(b) 6.25N/C

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**Explanation:**</h2>

The electric field (E) on a point charge, Q, is given by;

E = k x Q / r² ---------------(i)

Where;

k = constant = 8.99 x 10⁹ N m²/C²

r = distance of the charge from a reference point.

Given from the question;

E = 10000N/C

r = 0.250m

Substitute these values into equation(i) as follows;

10000 = 8.99 x 10⁹ x Q / (0.25)²

10000 = 8.99 x 10⁹ x Q / (0.0625)

10000 = 143.84 x 10⁹ x Q

Solve for Q;

Q = 10000/(143.84 x 10⁹)

Q = 0.00695 x 10⁻⁵C

Q = 6.95 x 10⁻⁸ C

The magnitude of the charge is **6.95 x 10⁻⁸ C**

(b) To get how large the field (E) will be at r = 10.0m, substitute these values including Q = 6.95 x 10⁻⁸ C into equation (i) as follows;

E = k x Q / r²

E = 8.99 x 10⁹ x 6.95 x 10⁻⁸ / 10²

E = 8.99 x 10⁹ x 6.95 x 10⁻⁸ / 100

E = 6.25N/C

Therefore, at 10.0m, the electric field will be just **6.25N/C**

**Answer: It was a big learning platformed and influenced millions of people. Without it we wouldnt be where we are today**

**Explanation:**

The increase in** tension** on the** steel wire** is** 8,484.75 N.**

The given parameters;

- <em>original length of the wire, l = 8 m</em>
- <em>radius of the wire, r = 2 mm</em>

The **area **of the **steel wire** is calculated as follows;

The **extension **of the** steel wire** is calculated as follows;

The increase in** tension** on the** steel wire** is calculated as follows;

Thus, the increase in** tension** on the** steel wire** is** 8,484.75 N.**

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