First convert the speed of mosquito to m/s:

So the mosquito is flying at (2,400/3,600) m/s,
or ⅔ m/s.

<span>

Since you are moving at 2m/s, so this makes the closing
velocity between you and the mosquito to be 2⅔ m/s. </span>

Therefore the mosquito will hit your sunglasses at:<span>

35 m / (2⅔ m/s) = 13⅛ seconds.

2.0 m/s * 13⅛ s = 26¼ m from your initial position.

<span>⅔ m/s * 13⅛ s = 8¾ m from the mosquito's initial position. </span></span>

**Answer:**

The stress is calculated as

**Solution:**

As per the question:

Length of the wire, l = 75.2 cm = 0.752 m

Diameter of the circular cross-section, d = 0.560 mm =

Mass of the weight attached, m = 25.2 kg

Elongation in the wire,

Now,

The stress in the wire is given by:

(1)

Now,

Force is due to the weight of the attached weight:

F = mg =

Cross sectional Area, A =

Using these values in eqn (1):

You have to do the math of each and see which one adds up to 66.5

An atom would be your answer, so **B!**