To calculate the speed of wave, what two pieces of information do you need about the wave ? help asap plz i’m being timed!!!

Wave length x Wave frequency

Explanation:

The wave length is measured in meters X the wave frequency, measured in hertz (Hz)

The speed of a wave is a property of the medium changing the speed actually requires a change in the medium itself. If the medium does not change as a wave travels, the wave speed is constant.

TO CALCULATE IT

Wave Speed Formula

Speed of the tsunami (meters/second) is equal to the square root of g (the acceleration due to gravity, which a constant 9.81 meters/second) times the water depth (d) at which the disturbance occurred (meters).

answer; ///i believe that the correct answer is (e); check first good

littering streams           is the answer