Question

(i)
The time a sound wave having frequency 2 kHz and wavelength 35 cm requires to are th
distance of 1.5 km is
(a) 20 s
(b) 2.1 s
(d) 8 s
(c) 21 s​

Answer 1

Answer:

C

Explanation:

frequency x wavelength = velocity

v - 2000 * 0.035

v- 70

now

t - d/v

1500/70

t -21 s