Doppler Effect.

BITSAT Help › Mechanics questions › Doppler Effect.

A man stands on the top of a high building with a source of sound with frequency 1000 Hz.He accidently drops the device.Find the frequency of the sound heard by the man 4 seconds after he drops the device?(Speed of sound=320 m/s,g=10 m/s²)?

1)888 Hz
2)860 Hz
3)894.75 Hz
4)930 Hz

#Physics #Mechanics

UP 0 DOWN 0 0 4
Post on FacebookPost anonymously?

4 Answers

383

Soumyabrata Mondal ·2013-03-03 22:09:18

1) 888 Hz

UP 0 DOWN 0
Post on FacebookPost anonymously?

383

Soumyabrata Mondal ·2013-03-03 22:13:33

n_a=(vv-v_s)n_o
v_sâ†’velocity of the source = 40m/s
v â†’Speed of sound=320 m/s

n_oâ†’1000 Hz

UP 0 DOWN 2
Gaurav Gardi vs=-40m/s
Upvote·0· Reply ·2013-03-03 22:29:49
Soumyabrata Mondal sorry, typng mistake :(
Upvote·0· Reply ·2013-03-03 22:41:39
Post on FacebookPost anonymously?

1057

Ketan Chandak ·2013-03-04 00:04:38

dude...did the same thing...got the same answer....but the answer given is not that...

UP 0 DOWN 4
Gaurav Gardi is it (3)
Upvote·0· Reply ·2013-03-04 00:47:11
Ketan Chandak yes it is....do provide the solution...
Upvote·0· Reply ·2013-03-04 02:52:08
Soumyabrata Mondal but for this ans Vs=37.64
Upvote·0· Reply ·2013-03-04 03:05:32
Soumyabrata Mondal how Vs can be 37.64????
Upvote·0· Reply ·2013-03-04 03:06:10
Post on FacebookPost anonymously?

15

Anomitro Kundu ·2013-03-23 00:18:21

1000hz

UP 0 DOWN 1
Anomitro Kundu But this option is not there......
Upvote·0· Reply ·2013-03-23 00:18:50
Post on FacebookPost anonymously?

Your Answer

Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω