Do you have a better answer to this question?

Join Alexa Answers and help make Alexa smarter. Get started

Science

How fast is mach nine?

3 Answers

Mach 9 would be about 5900 mph, at a reasonable altitude of 80000 feet. The Mach number is based on the speed of sound, which gets slower the higher your altitude. At sea level, Mach 9 would be closer to 6750 mph, but it would be very unusual for an aircraft to fly so fast that low.

{{ relativeTimeResolver(1564863029533) }}

LIVE

Points

126

Rating

0

The speed of Mach 9 (where Mach 1 is speed of sound) equals to 11113 km per hour (6905 mi per hour).

{{ relativeTimeResolver(1570921709792) }}

LIVE

Points

122

Rating

0

Mach 9 is equal to 6,669.8729 Miles per Hour or 10,734.12 Kilometers per Hour.

{{ relativeTimeResolver(1564863461796) }}

LIVE

Points

131

Rating

0

Sign-in to view all answers

Similar Questions

How fast is mach three?

Science • 1 Answer

How fast is mach five?

Science • 2 Answers

How fast is mach six?

Science • 2 Answers

How fast is mach four?

Science • 4 Answers

How fast is mach eight?

Science • 1 Answer

Join Alexa Answers

Help make Alexa smarter and share your knowledge with the world