Waves move fastest in low temperatures ?

FALSE

It moves fast at high temperatures

Explanation:

On increasing the temperature of the medium the vibration of medium molecules will be more also the amplitude of the vibration will increase.

So We can say that the disturbance that is carried by the waves can be easily transmitted through the medium when it is passed through a medium at high temperature.

In all three medium i.e. solid liquid or gas the energy or disturbance can be carried faster when temperature is increased

So above statement is NOT true that waves moves fastest in low temperature but the correct statement should be like this that waves moves fastest at highest possible temperature of the given medium

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.