Question

what is respiration??​

Answer 1

Answer:

Respiration is the sequence of events that results in the exchange of oxygen and carbon dioxide between the atmosphere and the body cells. ... This is called external respiration. The blood transports the gases to and from the tissue cells. The exchange of gases between the blood and tissue cells is internal respiration.

Answer 2

Explanation:

Step-by-step explanation:

Step-by-step explanation:

Answer :-

Distance travelled by the body :-

→ In first 3 sec is 27 m .

→ 9th second of it's motion is 16 m .

Explanation :-

Firstly, let's calculate the acceleration and initial velocity of the body.

For 3rd second :-

⇒ 10 = u + a/2[2 × 3 - 1]

⇒ 10 = u + 5a/2

⇒ 10 = u + 2.5a -----(1)

For 5th second :-

⇒ 12 = u + a/2[2 × 5 - 1]

⇒ 12 = u + 9a/2

⇒ 12 = u + 4.5a -----(2)

Subtracting eq.2 from eq.1 :-

⇒ 10 - 12 = u + 2.5a - u - 4.5a

⇒ - 2 = - 2a

⇒ a = 1 m/s²

Putting value of 'a' in eq.1 :-

⇒ 10 = u + 2.5(1)

⇒ u = 10 - 2.5

⇒ u = 7.5 m/s

________________________________

By using the 2nd equation of motion :-

s = ut + ½at²

⇒ s = 7.5(3) + ½ × 1 × (3)²

⇒ s = 22.5 + 4.5

⇒ s = 27 m

Now, from the equation of distance covered in the 'nth' second :-

sₙₜₕ = u + a/2(2n - 1)

⇒ s₉ₜₕ = 7.5 + 1/2[2 × 9 - 1]

⇒ s₉ₜₕ = 7.5 + 0.5[17]

⇒ s₉ₜₕ = 7.5 + 8.5

⇒ s₉ₜₕ = 16 m

Oyee tu I'd maat bana mai ban rahi tu chup chap answer kar noi to sar phorungi tera xD