Speed = (wavelength) x (frequency) = (10) x (100) = 1,000 meters per second
Wave speed = (wavelengtth) x (frequency) = (10) x (110) = 1,100 meters per second
The speed of a wave is equal to its wavelength times its frequency. Since you are using SI units, the answer will be in meters/second.
10*4 = 40 metres per second
The object is moving at the speed of 50 ms-1 .
That depends on how fast you are moving.
High pitch = high frequency = short waves = comes from something moving fast Low pitch = low frequency = long waves = comes from something moving slower
20 meters per second
It depends, if you mean light or sound waves, for example, there are a variety of factors to be measured: The length of a wave from peak to peak is represented with lambda. You can also measure velocity of a wave (how fast and in what direction it is moving). Frequency of light effects the color of the light, and frequency of sound effects its pitch.