The types of experimental research design are determined by the way the researcher assigns subjects to different conditions and groups. They are of 3 types, namely; pre-experimental, quasi-experimental, and true experimental research.
Answer:
all of them
Explanation:
all of the options promote and pratice better respiratory and hand hygiene.
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Answer: Its Good to be very flexible.
Explanation: You'll find that most athletes, take a lot of time to include stretching in their training for their sport's. Most athletes do Yoga or Gymnastics. Being Flexible Is good but especially for athletes it is great because it brings that chance of getting injured or cramped while training while doing their sport to a much lower level.
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The induction of vibrations in an object due to the vibrations in another object is known as resonance. Resonance occurs when an object vibrates at the resonance frequency of another object. The synchronous vibrations of the two objects create an amplitude of vibration that is larger than the amplitudes of vibration of the individual objects.