At night, the amount of CO2 in atmosphere increases the density of atmosphere. Since, Speed of sound is inversely proportional to the square root of density.
Hence, speed of sound is greater during day than in night.
Correct Answer - (a) True, (b) False, H zone of striated muscle fibre represents only filaments ; (c ) True, (d) False, There are 12 pairs of ribs in man...
Given: λa = 1 m, λl = 2.5 m, va = 330 m/s,
To find: Speed of sound (vl)
Formula: v = nλ
Calculation:
From formula,
Since the frequency n remains the same,
va = nλa and vl = nλl
∴ \(\frac{v_l}{v_a}=\frac{λ_l}{λ_a}\)
∴ vl = va \(\frac{λ_l}{λ_a}\) =...
i. Velocity of sound is directly proportional to square root of absolute temperature.
Hence, whistle’s sound will be first heard by Prakash in summer than in winter.
Therefore, the time interval between...
1. The given statement is true.
2. Secondary growth is observed in most of the dicot and gymnospermic root by producing secondary vascular tissue and periderm.
3. Secondary growth is produced by...
Correct Answer - (i) TRUE
(ii) Flase , more than 50,000
(iii) Flase, Ecomsystem diversity is low in Norway because of the ocurrence of a small number of ecosystems.
