# Calculating Speed of Military Airplane at Mach 2.00

• soulja101
In summary, the conversation discusses the calculation of the speed of a military airplane in km/h at sea level and at 0 degrees, using the equation mach number=speed of object/speed of sound. The attempt at a solution involves dividing the speed of sound by the mach number, but the resulting answer is wrong. The conversation also mentions the potential impact of density on the speed of sound and suggests trying the calculation again.

## Homework Statement

A military airplane can travel at mach 2.00 What is the speed in km/h at sea level and at 0 degress

## Homework Equations

mach number=speed of object/speed of sound

## The Attempt at a Solution

speed of object=speed of sound divided by mach number
322meters per second/2.00
=166m/s that's answer i got for the 0 degrees but its wrong because the answer is supposed 2390km/h i don't know how to get the sea level one.

The speed of sound changes with density. It travels faster under water for instance.

wat do u mean

so i can get the answer i don't think the teacher wanted us to the density thing, is there another way of doing this

mach number=speed of object/speed of sound

Correct.

speed of object=speed of sound divided by mach number

Try again. If the speed limit sign says "30 miles per hour" and the officer says "I just clocked you at twice the posted limit", does that mean you were going 15 mph or 60?

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## 1. How is Mach 2.00 speed calculated for military airplanes?

Mach 2.00 speed is calculated by dividing the speed of the airplane by the speed of sound in the same medium. This is known as the Mach number and is represented by "M". For example, if a military airplane is traveling at 1500 miles per hour, and the speed of sound in air is approximately 761 miles per hour, then the Mach number would be 1500/761 = 1.97. To reach Mach 2.00, the airplane would need to travel slightly faster at 1522 miles per hour.

## 2. What factors affect the speed of a military airplane at Mach 2.00?

There are several factors that can affect the speed of a military airplane at Mach 2.00, including the altitude at which it is flying, the design and shape of the airplane, and external conditions such as air temperature and air density. These factors can impact the speed of sound and therefore affect the Mach number of the airplane.

## 3. How does flying at Mach 2.00 compare to other speeds?

Mach 2.00 is considered to be a supersonic speed, meaning it is faster than the speed of sound. In comparison, subsonic speeds are below the speed of sound, while hypersonic speeds are five times or more the speed of sound. For reference, the speed of sound in air is approximately 761 miles per hour, or 1,225 kilometers per hour.

## 4. What is the maximum Mach number that military airplanes can reach?

The maximum Mach number that military airplanes can reach depends on several factors, including the design and capabilities of the specific airplane. However, some military airplanes have been able to reach Mach 3.2, such as the Lockheed SR-71 Blackbird. Advances in technology and engineering may allow for even higher Mach numbers in the future.

## 5. How does Mach 2.00 speed impact military airplane performance?

Mach 2.00 speed can significantly impact the performance of a military airplane. At these speeds, aerodynamic forces such as drag and lift become more complex and can affect the stability and control of the airplane. Additionally, the high temperatures and pressures at supersonic speeds can also pose challenges for the airplane's structure and materials. Therefore, extensive testing and engineering are necessary to ensure the safety and effectiveness of military airplanes at Mach 2.00 speeds.