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  1. ... in some solid, such as iron 5000ms-1 so Q1 velocity no change, u flick faster will only increase the frequency. And so the wavelength will decrease...

  2. ...the same string stretched under the same tension is used, rapid flicking of the string thus doesn't affect the wave speed.

  3. ...mouth of the patient, such that reading of the body temperature can be taken. Flicking the themometer before another use is to ensure that all remaining mercury in...

  4. Differences: wave in the string is 1) transverse 2) standing / stationary 3) energy is not transmitted to others wave in air is 1) longitudinal 2) travelling 3) energy is transmitted to surroundings...

  5. The wave speed of transverse wave in a long stretched spring is given by: v = √(T/μ) where T = Tension in the spring μ = Mass per unit length of the spring So only (3) can increase the wave speed.