Height of the tower, s = 300 m
Initial velocity of the stone, u=0
Acceleration, a = g = 9.8 m/s 2
Speed of sound in air = 340 m/s
The time (t1 ) taken by the stone to strike the water in the pond can be calculated using the second equation of motion, as:
\(s=ut_1+\frac{1}{2}gt_1^2\)
\(300=0+\frac{1}{2}×9.8×t_1^2\)
\(∴ t_1=\sqrt\frac{300×2}{9.8}=7.82\,s\)
Time taken by the sound to reach the top of the tower, \(t_2-\frac{300}{340}=0.88\,s\)
Therefore, the time after which the splash is heard, \(t=t_1+t_2\)
= 7.82 + 0.88 = 8.7 s
Give reasons for the following.
(i) King Tut’s body has been subjected to repeated scrutiny.
(ii) Howard Carter’s investigation was resented.
(iii) Carter had to chisel away the solidified resins to raise the king’s remains.
(iv) Tut’s body was buried along with gilded treasures.
(v) The boy king changed his name from Tutankhaten to Tutankhamun.
Find the mean deviation about the median for the data
xi | 15 | 21 | 27 | 30 | 35 |
fi | 3 | 5 | 6 | 7 | 8 |
Sound is a vibration that propagates the mechanical wave of displacement and pressure, through a medium can be of any matter. In other words, the sound is the thin line between Music sound and Noise.
Sound can be divided into two types depending on its frequency. The following are:-