A sound wave traveling in the air has a frequency f and wavelength lambda. A sec

Question

A sound wave traveling in the air has a frequency f and wavelength lambda. A second sound wave travel wavelength lambda/2. What is the frequency of the second sound wave? 4f 2f 1/2f 1/4f The speed of traveling wave in a medium depends on how elastic the medium is the frequency of the oscillation the wavelength of traveling wave none of the above A car traveling around a curve at constant speed. Which is true? speed constant and acceleration is zero velocity changes and acceleration is not equal to zero velocity constant and acceleration is equal to zero velocity changes and acceleration is equal to zero

Explanation / Answer

in air, speed of sound is same.

v = lambda f = constant

if lambda' = lambda / 2

then f' = 2 f

Ans(b)

5. (D)

6. speed is constant but direction is changing.

so velocity (has both magnitude and direction) is changing.

if velocity changes that means acceleration is non-zero.

Ans(b)

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