How to calculate questions about Waves

This calculation must be done in two parts. Use the time period to find the frequency then use the frequency and wavelength to find the wave speed

Time period = 1 ÷ frequency.

0.42 = 1 ÷ frequency.

frequency = 1 ÷ 0.42.

= 2.38 Hz.

wave speed = frequency × wavelength.

wave speed = 2.38 × 0.34.

= 0.809 m/s.

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asthenosphere and convection

the assestment will probley apele with cause and effect