Please answer these questions in as much details as possible please and thank you in advance figure 1 is the first picture and figure 2 is the second picture

5. The pressure variation versus distance in a sound wave in air is shown in Figure 1 on page 3. The speed of sound in water is v = 1500 m/s. (The answers should include units) a) What is the wavelength of this wave? b) Find the frequency of this wave. c) Does this sound wave belong to ultrasound or not? Explain your answer. 6. Find the velocity of ultrasound in a tissue where a 3-MHz frequency ultrasound pulse has a 480-pm wavelength (1 pm = 106 m). What type of tissue is it? (Include units) 7. a) Write an equation which defines the acoustic impedance of a tissue. Explain the quantities which appear in this equation. b) Give examples of the values (including units) of the acoustic impedance for three different tissues. 0) Find a percentage of the ultrasound intensity reflected from the interface separating muscle and bone (use the table for the acoustic impedance). 10. An A-scan is shown in Figure 2 on page 4. What is the time delay between the initial pulse and the first echo which produce this A-scan? (Include units) Figure 1. Sinusoidal sound wave in water: The pressure versus distance 0.0 0.1 0.2 0.3 0.4 0.5 0.6 Distance, meters Figure 2. A-scan X HAScan TM-mode File Options Scale View Modi About B-mode AScan 1 MHz Sound Velocity [m/s] 2690.0 4 > FFT Filter Stop Full Time Depth HF Amp HF+AMP Input Voltage M Reflection 1.0 - 0.5 - -0.5- 190 120 8- Depth [mm] -1.0 - 20 TGC [dB] 35- 30 - 25- 20- 15- 10- 5- 100 120 60 30 Difference Amplitude Cursor1 0.500V Output Gain 8.6 mm 8.0 mm 0.5 mm 10 dB 30 de