Question: Need help with showing work for these questions: 18. You need to determine the density of a ceramic statue. If you suspend it from a

Need help with showing work for these questions:

18. You need to determine the density of a ceramic statue. If you suspend it from a spring scale, the scale reads 28.4 N. If you then lower the statue into a tub of water so that it is completely submerged, the scale reads 17.0 N. What is the density?

19. What are the wavelengths of sound waves at the limits of human hearing and at the midrange frequency of 500 Hz? Notes sung by human voices are near 500 Hz, as are notes played by striking keys near the center of a piano keyboard.

20. The wavelength of microwaves in a microwave oven is 12 cm. What is the frequency of the waves?

21. A dolphin emits ultrasound at 100 kHz and uses the timing of reflections to determine the position of objects in the water. What is the wavelength of this ultrasound?

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