**Answer:**

**Explanation:**

The electric field inside of a conductor is 0 because the conduction electrons are pushed to the outer edges of the conductor. The surface of the conductor still has charge.

**Answer:**

86.33m/s^2

**Explanation:**

Acceleration = Force/Mass

= 25.9/0.3

= 86.33

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**Answer: n=4**

**Explanation:**

We have the following expression for the **volume flow rate** of a hypodermic needle:

**(1)**

Where the dimensions of each one is:

**Volume flow rate **

**Radius of the needle **

**Length of the needle **

**Pressures at opposite ends of the needle ** and

**Viscosity of the liquid**

We need to find the value of whicha has no dimensions, and in order to do this, we have to rewritte **(1) **with its dimensions:

**(2)**

**We need the right side of the equation to be equal to the left side of the equation (in dimensions):**

**(3)**

**(4)**

**As we can see must be 4 if we want the exponent to be 3:**

**(5)**

**Finally:**

**(6)**