Answer:

Explanation:
Given:
- diameter of hose pipe,

- diameter of nozzle,

- volume flow rate,

<u>Now, flow velocity in hose:</u>



<u>Now, flow velocity in nozzle:</u>



We know the Bernoulli's equation:

when the two points are at same height then the eq. becomes




Answer:
air because their is nothing contained within the air other than all the solutions that you have listed
Explanation:
1 g = 1 ÷ 1000 kg
= 0.001 kg
1 cm³ = 1 ÷ 100 ÷ 100 ÷ 100 m³
= 0.000001 m³
1 g/cm³ = 1 g / 1 cm³
= 0.001 kg / 0.000001 m³
= 1000 kg/m³
The density is 1000 kg/m³.
Answer:
B is the best answer for the question