At 3 weeks, you can begin to offer toys to a newborn Yorkie puppies. At this time milk teeth can begin to erupt and puppies may enjoy having something to gnaw at. The 1st deworming may be done. Make sure that your dog's veterinarian approves. This will depend on the weight of the puppy and the pup's health.
One megahertz (abbreviated: MHz) is equal to 1,000 kilohertz, or 1,000,000 hertz. It can also be described as one million cycles per second. Megahertz is used to measure wave frequencies, as well as the speed of microprocessors. Radio waves, which are used for both radio and TV broadcasts, are typically measured in megahertz.
Megahertz means millions of cycles per second, so 91.5 megahertz means that the transmitter at the radio station is oscillating at a frequency of 91,500,000 cycles per second. Your FM (frequency modulated) radio can tune in to that specific frequency and give you clear reception of that station. All FM radio stations transmit in a band of frequencies between 88 megahertz and 108 megahertz. This band of the radio spectrum is used for no other purpose but FM radio broadcasts. In the same way, AM radio is confined to a band from 535 kilohertz to 1,700 kilohertz (kilo meaning thousands, so 535,000 to 1,700,000 cycles per second).