A thunder clap was heard 6 seconds after a lightening flash was seen. If the speed of sound in air is 340 m/s at the time of observation, the distance of the listener from the thunder clap is ………
(A) 56.6 m
(B) 346 m
(C) 1020 m
(D) 2040 m
1 Answers
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A girl stands 170 m away from a high wall and claps her hands at a steady rate so that each clap coincides
i. When the girl makes 60 claps in 1 minute, the value of speed of is 340 m/s. ii. The girl is at a distance of 226.67 m from the wall...
2 Answers 1 views
A man standing between 2 parallel eliffs fires a gun. He hearns two echos one after 3 seconds and other after 5 seconds.
distance (s) = 1360 m, time for first echo = 3 s, time for second echo = 5 s To Find : speed of sound (v) Formula : speed = distance/time Calculation : Time for first...
2 Answers 4 views
`{:(,"Column A",,, "Column B"),(A., 1 MHz, ( ), a., 10^(6) Hz),(B., 340 ms^(-1), ( ), b., "Decibel"),(C., "Music", ( ), c., "Velocity of sound in air
Correct Answer - A : a B : c C : e D : b E : d
2 Answers 1 views
The wavelength of a sound note is 1 m in air and 2.5 m in a liquid. Find the speed of sound in the liquid, if the speed
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 \(\frac{λ_l}{λ_a}\) =...
2 Answers 2 views
The velocity of sound in air at 27 °C is 340 m/s. Calculate the velocity of sound in air at 127 °C.
Given: T1 = 27 °C = 27 + 273 = 300 K, v1 = 340 m/s, T2 = 127 °C = 127 + 273 = 400 K To find: Velocity (v2) Formula: \(\frac{v_1}{v_2}=\sqrt{\frac{T_1}{T_2}}\) Calculation: From formula, v2 = v1 \(\sqrt{\frac{T_2}{T_1}}\) = 340, \(\sqrt{\frac{400}{300}}\) =...
2 Answers 1 views
The wavelength of sound in air is 1.5 m and that in liquid is 2 m. If the velocity of sound in air is 330 m/s, the velocity of sound in liquid is
Correct option is: (B) 440 m/’s
2 Answers 6 views
The velocity of sound in a gas is 340 m/s at the pressure P, what will be the velocity of the gas when only pressure is doubled and temperature same?
Correct option is: (C) 340 m/s
2 Answers 1 views
A sound note emitted from a certain source has a velocity of 300 m/s in air and 1050 m/s in water. If the wavelength of sound note in air is 2 m
Correct option is: (C) 7 m
2 Answers 1 views
The speed of sound in air at NTP is 330 m/s. The period of sound wave of wavelength 66 cm is ……………
Correct option is: (D) 0.2 × 10-2 s
2 Answers 15 views
Match the amount of current generated A given in column – II with the sources given in column -I. Column I - 1. Lightening
Column I Column II 1. Lightening b. 10000 A 2. House hold circuits a. Few amperes
2 Answers 3 views