Question

Which of the following is supersonic speed?
A) $210{\text{ m/s}}$
B) $410{\text{ m/s}}$
C) $310{\text{ m/s}}$
D) $280{\text{ m/s}}$

Answer 1

Hint: When the speed of an object exceeds the speed of sound it is said to have supersonic speed. Some vehicles travel at speeds greater than the speed of sound. They travel at a speed of around $768miles/hour $. Supersonic aircraft travel with speeds greater than the speed of sound.

Complete step by step solution:
Any object that can achieve a speed greater than the speed of sound through the air can be called a supersonic object. The speed of sound in air is near about $343m/s$. And speed greater than this is supersonic.
In the given options, the only speed greater than the speed of sound is $410m/s$

The answer is Option (B): $410m/s.$

Note: The speed that exceeds five times the speed of sound is called hypersonic speed. Many fighter aircraft travel with supersonic speed. There are not many supersonic civilian aircraft as there are many practical difficulties present. One major disadvantage of supersonic air crafts is the high amount of heat generation. When an object travels at a supersonic speed it will generate a shock wave and the sound associated with this shock wave is called the sonic boom.

Sonic booms can cause severe damage to hearing and body. A crack that travels faster than the speed of sound through a brittle material is called a supersonic fracture. The term supersonic is different from ultrasonic which refers to sounds with a frequency greater than the frequency of sound. The first object ever made of achieving supersonic speed is the tip of a bullwhip.