WAEC - Physics (1990 - No. 23)
A bat emits a sound wave at a speed of 1650.0ms-1 and receives the echoes 0.15s later. Calculate the distance of the bat from the reflector
8.75m
16.50m
87.75m
123.75m
330.00m
คำอธิบาย
Distance x = vt/2 =
1650 x 0.152
= 123.75m