When the probe strip is pulled along the surface of the unprinted side of the magnet, differences in force can be felt as the strip makes small up and down motions.
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Ответ:
A:The wave travels faster and with the same wavelength.
Explanation;Sound waves are mechanical waves which require a material medium for transmission. The transmission of sound waves involves the vibration of particles of the material medium thus movement of energy from one point to another. Sound waves entering a warmer air means that the kinetic energy of the air particles will increase and thus the vibration of particles will be increased and thus the speed of transmission of sound waves increases.