Weaning Your Baby Onto Solids. The term 'to wean' comes from an ancient phrase that means 'to accustom to'. So weaning refers to the period during which an infant gradually becomes accustomed to food other than milk (breast or formula). Up until 6 months of age, breast or formula milk alone is nutritionally adequate.
Occasional airplane vibration during flight is not unusual. There are many causes of airplane vibration, including landing gear extension and retraction, extension of speed brakes, free play in movable surfaces, and systems malfunctions.
Tires. A variety of tire problems can cause a vehicle to vibrate. Tires with unevenly worn tread are one of the most common culprits of a vibration. The vibration is caused by the varying levels of tread coming in contact with the road at the same time, creating an uneven ride.