Find the acoustic impedance of the plastic pan by taking the ratio between the amplitude of...

Find the acoustic impedance of the plastic pan by taking the ratio between the amplitude of the echo from the water plastic interface and the echo from the plastic/air interface. Write down an equation relating this ratio to the acoustic impedance of the plastic.

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genius_generous answered 2 years ago

Explain the term acoustic impedance and state the tissue properties which determine its value.

I. Explain the term acoustic impedance and state the tissue properties which determine its value.

I. Explain the term acoustic impedance and state the tissue properties which determine its value. II. A medium attenuates ultrasound at a rate of 0.7 dB cm −1 MHz −1 . A target at a depth of 5 cm below the transducer is imaged with a 3 MHz ultrasound pulse. By how many dB will the echo from the target be attenuated compared to a similar target at a depth of 1 cm? III. Explain why bone and gas...

1-The process of taking the ratio between the known market size of a product and an...

1-The process of taking the ratio between the known market size of a product and an economic indicator such as personal income in one country, and applying that ratio to another country's personal income statistic assists in determining the market potential is known as Group of answer choices estimation by cluster analysis. multiple factor estimator. estimation by analogy. trend analysis estimator. 2-The research technique to estimate product adoption rates using factors such as lifestyle or cosmopolitanism is known as: Group...

Find the ground state energy of the He atom by taking the Coulomb potential between two...

Find the ground state energy of the He atom by taking the Coulomb potential between two electrons as perturbation.

Find the amplitude and phase of the reﬂected and transmitted waves for the case where the...

Find the amplitude and phase of the reﬂected and transmitted waves for the case where the knot has a mass m and the second string is massless.

Use the Smith Chart to find the input impedance of a lossless line of length l...

Use the Smith Chart to find the input impedance of a lossless line of length l terminated in a normalised load impedance zL for l = 0.2λ and zL = 1 + j2. How the value of the input impedance will change if l = 0.5λ? (Show all steps on the Smith chart).

Consider a helium ion He+. a) Find the ratio between the ionization energy of the H...

Consider a helium ion He+. a) Find the ratio between the ionization energy of the H atom and and the He^+ ion. b) How does the Bohr radius, we defined for H atom, differ for He^+ ? Using the Bohr radius of He^+ and the representation of the ground state wave function for the H atom, write the ground state wave function for the He^+. c) Find the average distance of a 1s electron from a nucleus in He+ ion....

A certain plastic has n = 1.72, find the critical angle for the plastic/air interface.

Find the Fourier series for a triangle wave of amplitude 1 and frequency f0.

For the following exercises, determine the amplitude, period, and midline of the graph, and then find a formula for the function.

For the following exercises, determine the amplitude, period, and midline of the graph, and then find a formula for the function.Give in terms of a sine function.

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