Question

1. eli moves his hand back and forth slowly, creating a longitudinal wave in the spring toy.4) then, he moves his hand back and forth more quickly. this creates a wave with more energy.4) describe what happens when eli moves his hand back and forth more quickly. complete the sentences.4) the wavelength of the wave and the frequency of the wave. as a result, the energy of the wave

Explanation:

When Eli moves his hand back and forth more quickly:

• The wavelength of the wave decreases. In a longitudinal wave (like in the spring toy), a faster hand - movement (higher frequency) leads to closer - packed compressions and rarefactions, which means a shorter wavelength.
• The frequency of the wave increases. Frequency is the number of wave cycles per second. A quicker back - and - forth motion means more cycles occur in a given time.
• As a result, the energy of the wave increases. The energy of a wave is related to its frequency (\(E = hf\), where \(h\) is Planck's constant for electromagnetic waves, and for mechanical waves like the spring wave, higher frequency (with the same amplitude, assuming amplitude is constant in this case as it's about hand - movement speed change) also implies more energy transfer per unit time).

Answer:

The wavelength of the wave decreases and the frequency of the wave increases. As a result, the energy of the wave increases.