Why sound needs medium for propagation? A particle oscillates 40 times in one minute what will be its time period of oscillations.
plz say me the answer
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Which of the following represents an upside-down image?

Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?