4.10 Speed of sound and echoes

In air, the speed of sound is

• 330 m/s

• 350 m/s

• 760 mph

• 790 mph

The speed of sound depends on:

• The temperature

• The medium

• Both the temperature and the medium

• None of above

Speed of sound in air at 0 degrees C:

• 330 m/s

• 5000m/s

• 1400 m/s

• 350 m/s

Speed of sound in air at 30 degrees C:

• 330 m/s

• 5000m/s

• 1400 m/s

• 350 m/s

Speed of sound in concrete:

• 330 m/s

• 5000m/s

• 1400 m/s

• 350 m/s

Speed of sound in water at 0 degrees C:

• 330 m/s

• 5000m/s

• 1400 m/s

• 350 m/s

Sound takes about _ seconds to travel 1 km.

(a)  

You hear lightning _ you see it.

• Before

• After

• As soon as

If you arrange the speed of sound in different states of matter from fastest to slowest, it would be

• solid, liquid, gas

• liquid, gas, solid

• gas, solid, liquid

• same in all the states

Distant trains and traffic often sound

• louder at night

• louder during the day

• same at all times