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assume that the bulk madulus and density of seavater are B= 2.34 x 10^9 N/m^2 and p = kg/m^3. From a point source inside the ocean we generate a sound wave. This wave propagates isotropically (the same in all direction, spherical wave) with frequency of f= Hz. The amplitude of the wave at m from the source of the sound is Sm=m.
a What is the speed of propagation of the sound wave?
b What is the intensity of the sound wave at 10m from the source of sound
c Suppose we now replace this medium (seawater) with air, we keep the same amplitude of the wave at m and the same frequency. What is the intensity of sound wave at m from the source of sound?
Suppose that a voice signal normally occupies 30 kHz of bandwidth and has a signal-to-noise ratio of 20 dB. Spread-spectrum techniques are used to increase its bandwidth to 2 MHz. (a) What is the signal-to-noise ratio of the spread signal
find the maximum rectangular area that can be enclosed with 1400 feet of fence if one side of this are lies along a straight section of a river and does not require fencing.
What is the equivalent input noise resistance of an amplifier known to produce 20 V of equivalent input noise over a bandwidth of 750 kHz
The Ic was measured for different values of a load resistance. It was noticed that Ic was pretty much constant for the first 1900 ohms values, but then it suddenly decreased. Why did that happen
A piece of n-type silicon is doped so that the majority carrier concentration is 10^15 cm^-3 What is the minority carrier concentration? (ni = 1.5 x 10^10 cm^-3) If a piece of silicon is doped with phosphorus to 10^17 cm^-3, what are the equilibrium ..
Discuss how can identify which resistances are in series and which ones are in parallel in a series-parallel circuit. How might this affect how you measure current and voltages in the circuit with a digital multimeter
Consider a PCM-TDM system in which 24 signals are to be processed. Each signal has a baseband bandwidth of 3 KHz. The sampling rate has to be 33.3% higher than the theoretical minimum, and 8 bits are to be used.
What degree of matching in emitter area is required for the base-emitter voltages of two bipolar devices with identical collector currents to have a difference of less than 5.0mV. Use VT= 25.85mV.
In a steam plant where you work, the turbine develops 1000 kW. The heat supplied to the steam in the boiler is 2800 kJ/kg and the heat rejected by the steam to the cooling water in the condenser is 2100 kJ/kg.
At the beginning of each year, the cows are divided into three groups. Young heifers (aged 0 to 1 year) make up the first group. The second group consists of cows aged 1 to 2 years, and the third group consists of all cows aged 2 years or older.
Suppose that you have graduated from College with an engineering degree and you start working for a local contracting company. For your first job, you are asked to design a circuit to duplicate the input-output response for small-amplitude inputs ..
Assume that this whole system is linear, so that, if the pressure on a sprinkler is halved, the area covered (as well as the flow rate) will be halved. This is true until the pressure is reduced below 20psi, at which it does not work at all.
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