Signs of Lyme disease include skin rash and painful inflammation of joints (particularly the knees), accompanied by flu-like symptoms. The symptoms of Lyme disease increase in severity as the disease spreads though the body. Early diagnosis and treatment are important to stop the progression of the disease. If untreated, the disease can result in neurological disorders such as peripheral neuropathy, including Bellâs palsy, as well as pain, numbness or weakness in the limbs.
Rating Newest Oldest. Best Answer: Commercial airliners travel slower than the speed of sound and usually cruise between 500 and 600 mph. The fastest planes can travel at greater than Mach III, 3 times the speed of sound which is about 770 mph, so faster than 2200 mph.
Current commercial aircraft fly with a cruise speed depending on the model and make of the aircraft that ranges between Mach 0.81 through Mach 0.86, that is a speed in the range of 900 km per hour. We call this subsonic flight. Concorde flew with a cruise speed of about 2,100 km per hour. The future generations of very fast commercial aircraft will fly with speeds of 4-5 times the speed of sound, that is in the range of 4,000-5,000 km per hour. History of supersonic flight. Development of supersonic flight started already in the early fifties of the 20 th century, initially