Register
The speed of an aircraft is given to be 900 km/h. If the speed of sound at that location is 315 m/s, the Mach number is _____. a. 0.63 b. 0.84 c. 1 d. 1.07 e. 1.20
54.0k views
4 votes
The speed of an aircraft is given to be 900 km/h. If the speed of sound at that location is 315 m/s, the Mach number is _____.

a. 0.63
b. 0.84
c. 1
d. 1.07
e. 1.20

User Tamarra
by
5.8k points

1 Answer

5 votes

Answer: B) 0.84

Step-by-step explanation:

Mach number is a relationship between the speed of an object in relation to the speed of sound. Mach number is always represented in ratio form a Mach number GREATER THAN ONE means the Object is moving at a SUPERSONIC SPEED while if is LESS THAN it means the Objective is moving at SUBSONIC SPEED,when it is EQUAL TO ONE means it is moving at a TRANSONIC SPEED,when it is GREATER THAN FIVE it is moving at a HYPERSONIC SPEED.

MACH SPEED=SPEED OF OBJECT/SPEED OF SOUND SPEED OF OBJECT= 900*1000/3600

SPEED OF OBJECT=250metersper second

MACH SPEED=250/315

MACH SPEED= 0.804

User Lok
by
6.1k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

6.5m questions

8.7m answers

Other Questions

A piston-cylinder device fitted with stops in the cylinder walls contains 2.1 kg of water initially at 150 kPa and 30 °C. Heat is transferred to the system until the final temperature reaches 250 °C. The
4. Which of the following is the first thing you should do when attempting to park? A. Securing the parking spot by standing in it B. Turning on your hazard lights C. Confirming the space can fit your
A water towers lowest point is 405 ft and the main line is 6 feet below the ground. The ground elevation is at 276 ft. The main line travels 2.9 miles. The pipe will travel through the following flanged
An activated sludge plant is being designed to handle a feed rate of 0.438 m3 /sec. The influent BOD concentration is 150 mg/L and the cell concentration (MLVSS) is 2,200 mg/L. If you wish to operate the
The bulk modulus of a fluid if it undergoes a 1% change in volume when subjected to a pressure change of 10,000 psi is (a) 0.01 psi (b) 0.001 psi (c) 0.00001 psi (d) 0.000001 psi (e) none of these
Link Copied!