Final answer:
To determine the speed of waves in water, the child can conduct an experiment using a large pool or basin filled with water. By dropping a cork into the water and measuring the wavelength and period of the waves, the child can calculate the speed of the waves.
Step-by-step explanation:
In order to determine the speed of waves created within the water in a pool, the child can conduct an experiment using a large pool or basin filled with water. The child can drop a cork into the water and observe the waves that propagate away from the cork. By measuring the wavelength and period of oscillation of the waves, the child can calculate the speed of the waves using the formula v = λ/T, where v is the speed, λ is the wavelength, and T is the period.
Additional equipment needed for this experiment may include a large bowl or basin, water, a cork, and a measuring tool to measure the wavelength and period of the waves.