JAMB - Physics (2011 - No. 18)
A cannon is fired from town X,after how long is the sound heard at a town Y 4.95 km away?
[velocity of sound in the air = 330 ms-1]
[velocity of sound in the air = 330 ms-1]
30 s
10 s
10 s
15 s
Giải thích
V = X/t
330 = ( 4.95 x 10^3)/t
t = (4.95 x 10^3/330 =
= 15 secs
330 = ( 4.95 x 10^3)/t
t = (4.95 x 10^3/330 =
= 15 secs