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.
1000 hertz is 1 kilohertz. 1000 kilohertz is 1 megahertz, 1000 megahertz is 1 gigahertz: (see table) The frequency of the Earth's spinning (once per ~24 hours) is about 12 microhertz (much smaller than 1 Hz). The hertz is sometimes used to measure the power of a processor in computing and electronics.