Question

very STIU
Lightning and thunder take place in sky
same distance from us. Explain why lightning is seen
earlier and thunder is heard later.
What devices are used to locate underwater objects
and to determine depths of water beneath the ship?
2.
Sound pulses emitted by dolphin travel through
20 °C ocean water at a rate of 1450 m/s. In 20°C
air, these pulses would travel 342.9 m/s. How can
you account for this differences in speed ?
If you clap on one end of a long steel pipe you will
hear two distinct sounds on the other end of the
i
Evrlain​

Answer 1

Answer:

velocity is of light is higher than that of light,"

Ecosounder

Answer 2

Answer:

1. Speed of light is faster than speed of sound.

Device used to find depth of the sea is SONAR.

2. Speed of sound is different in different mediums.refer your NCERT textbook for more information and speed in different mediums.

Explanation: