I think option b
During
lightening in the sky, when both light and sound are produced?
a) at different time
b) at same time
c) sound before light
d) light before sound
Why we see light before the sound of thunder during lightening in the sky?
a) sound is faster than light
b) light is faster than sound
c) the speed of sound and light is same
d) none of these
What is the speed of sound at 0◦ C temperature?
a) zero
b) 332 m/s
c) 240 m/s
d) 140 m/s
What is the speed of light?
a) zero
b) 340 km/s
c) 240 km/s
d) 300,000 km/s
Exercise:
Hertz is the unit of ……..
a) mass
b) energy
c) loudness
d) frequency
Correct answer is not showing.
by at 2023-12-02 19:48:47