
Mach number is used in connection with speed of
(a). Sound
(b). Aircraft
(c). Spaceship
(d). Ships
Answer
511.8k+ views
- Hint: Aeronautical engineers use this term as a unit of speed. It is a quantity studied in fluid dynamics so it should be related to aerodynamics and aircrafts.
Complete step-by-step solution -
The Mach number (M) is a quantity that is defined as the ratio of the velocity of a body divided by the speed of sound in undisturbed medium through which the body is travelling. It is a dimensionless quantity and it mainly depicts the ratio of flow of speeds.
Here M denotes the Mach Number
u is the velocity of aircraft
c is the speed of sound in the medium
The correct solution is Aircraft.
Additional information:
The term Mach number is named after an Austrian Physicist and philosopher Ernst Mach. Since Mach is not a unit of measure rather it is a dimensionless quantity it is written as Mach followed by the number for example- Mach 2 and not 2 Mach. When we say an aircraft is moving at Mach 1 its speed at that moment is 343 m/s. If the Mach number is less than one it indicates subsonic flow and if it is greater than 1 it means supersonic flow.
Note: If we take an aircraft flying at say Mach 0.3 then is traveling at 30% of the speed of sound or if we say that a missile is travelling at Mach 2 is traveling at two times the speed of sound.
Complete step-by-step solution -
The Mach number (M) is a quantity that is defined as the ratio of the velocity of a body divided by the speed of sound in undisturbed medium through which the body is travelling. It is a dimensionless quantity and it mainly depicts the ratio of flow of speeds.
Here M denotes the Mach Number
u is the velocity of aircraft
c is the speed of sound in the medium
The correct solution is Aircraft.
Additional information:
The term Mach number is named after an Austrian Physicist and philosopher Ernst Mach. Since Mach is not a unit of measure rather it is a dimensionless quantity it is written as Mach followed by the number for example- Mach 2 and not 2 Mach. When we say an aircraft is moving at Mach 1 its speed at that moment is 343 m/s. If the Mach number is less than one it indicates subsonic flow and if it is greater than 1 it means supersonic flow.
Note: If we take an aircraft flying at say Mach 0.3 then is traveling at 30% of the speed of sound or if we say that a missile is travelling at Mach 2 is traveling at two times the speed of sound.
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
School Full course for CBSE students
₹41,848 per year
Recently Updated Pages
Master Class 11 Economics: Engaging Questions & Answers for Success

Master Class 11 Accountancy: Engaging Questions & Answers for Success

Master Class 11 English: Engaging Questions & Answers for Success

Master Class 11 Social Science: Engaging Questions & Answers for Success

Master Class 11 Physics: Engaging Questions & Answers for Success

Master Class 11 Biology: Engaging Questions & Answers for Success

Trending doubts
Which one is a true fish A Jellyfish B Starfish C Dogfish class 11 biology CBSE

State and prove Bernoullis theorem class 11 physics CBSE

1 ton equals to A 100 kg B 1000 kg C 10 kg D 10000 class 11 physics CBSE

One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE

1 Quintal is equal to a 110 kg b 10 kg c 100kg d 1000 class 11 physics CBSE

Difference Between Prokaryotic Cells and Eukaryotic Cells
