What happens to the frequency of a wave when its energy invreases

Since the energy goes up as the frequency increases, the energy is directly proportional to the frequency. Because frequency and wavelength are related by a constant (c) the energy can also be written in terms of wavelength: E = h · c / λ. When the energy increases the wavelength decreases and vice versa.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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c) power lifting, will be your answer.

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