For this question we should apply

a = v^2 - u^2 by t

a = 69 - 0 by 4.5

a = 69 by 4.5

a = 15.33

a = 6.85 m/s^2

If the answer in option is near to answer then , you can mark it as correct.

.:. The acceleration is 6.9 m/s^2

**Answer:**

**Explanation:**

**Answer**

The true fact is that C is what happens in outer space. Both rotations take 27.3 days.

A: The exact opposite is true. It does rotate about it's axis.

B: Again this is just plain false. Given the way we observe it, the moon must be rotating around the earth.

D. they don't. 27.3 hours and 24 hours are not the same.

Answer:

300 m/s

Explanation:

The difference in time between the two bangs is 1 s.

Thus;

t2 - t1 = 1

We know that distance/time = speed.

Thus;

d2/v - d1/v = 1

Multiply through by v to get;

d2 - d1 = v

Where v is speed of sound in air.

d1 = 350 m

d2 = (150 × 2) + 350 = 650 m

Thus;

v = d2 - d1 = 650 - 350 = 300 m/s

**Answer:**

Hydraulic press is called an instrument for multiplication of force. Why? Because it uses Pascal's idea and principle: F=p*S. If we apply small force to small piston you will generate a pressure. According to Pascal's law pressure is the same everywhere in closed system so the same pressure will act on large piston on the other side too.

**Explanation:**

**Answer:**

3rd picture straight line going up right

**Explanation:**

3rd picture