A Jet Aircraft, in Level Flight at Constant Speed, Is

question 6

Multiple Choice

A jet aircraft, in level flight at constant speed, is observed directly overhead. A sonic boom is heard 7.0 s later, at which time the line of sight to the aircraft forms a 56° angle with respect to the horizontal. The speed of sound is 325 m/s. What is the Mach number (the ratio of the speed of the jet to the speed of sound) for the aircraft?

• A) 1.2
• B) 1.8
• C) 1.9
• D) 2.1
• E) 2.2

---

Definitions:

Low-level Disinfectant

A disinfectant that kills some viruses and bacteria, but not spore-forming or non-enveloped viruses, used for surface disinfection.

Incineration

Burn, setting afire.

Disposable Items

Products designed for a single use or a limited number of uses before being discarded.