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three coins are tossed. Describe the following events:
A. at least two heads occur.
B. At most one head occurs.
C. Exactly two heads occur.
D. No heads occur
Find the probability for the occurence of each event.
Frequency Range, Local Oscillator Frequency, Image Frequency, and Attenuation, A radio receiver for the AM broadcast band covers the frequency range 550 to 1600 kHz. The IF frequency is 455 kHz and the local oscillator is above the received signal..
The feedback capacitance of an inverting amplifier is 10pF. What is the Miller capacitance at the input if the gain of the amplifier is -120 What is the Miller capacitance at the output of the amplifier
A 50-Ohm line is terminated by a (60 +j60) Ohm load. An adjustable shorted shunt stub is placed 0.23 Lambda from the load. What is the smallest standing wave ration that can be achieved between the generator and the line by adjustment of the stub ..
Three point charges are positioned in the x-y plane as follows: 5 nC at y = 5 cm, -10 nC at y = -5 cm, and 15 nC at x = -5 cm. Find the required x-y coordinates of a 20-nC fourth charge that will produce a zero electric field at the origin.
1.2MW wind turbine has rotor diameter 64 m. Turbine operates in area with average wind veocity=7.5m/s with air density = 1.18kg / m^3. Turbine power coeff. including unit efficiency = 42.8 % Determine power output and the annual energy produced
f(t) = t. B. f(t) = Sin wt find F(s). C. f(x) = y" + 2y' +y D. f(x) = y"' +4y" + 6y' + 9y. E. Given a serious electrical LRC circuit with an input source of 3Sin wt find the current i(t) expressed as I(s). Hint: use jwL and 1/jwC and w = 2pief
A signal has a fundamental frequency of 1000 Hz. What is its period? Assume the signal has a peak amplitude of 1 Volt and that the instantaneous power is equal to the square of the voltage, then compute the average power of the fundamental frequen..
looking for a brief theory on touch voltage, step voltage and ground potential rise (GPR). Should include graphical representation and relevant equations to help in understanding.
A fluid flows through a turbine at the rate of 45 kg/min. Across the turbine the specific enthalpy drop of the fluid is 580 kj/kg and the turbine loses 2100 kj/min in the form of heat energy. Determine the power produced by the turbine.
An unknown semiconductor has a bandgap of 1.1eV and Nc = Nv. It is doped with 10^15 cm-3 donors where the donors fully ionized. Given that EF is 0.25 eV below Ec, calculate the concentration of electrons and holes in the semiconductor at 300 K and..
Saw on internet some equations to convert from frequency in hertz to mph. Some equations need a gear ratio while others do not. I found the equation mph = circumference * RPM * 60.
Concider an ac circuit source with an rms amplitude Irms connected to a parallel RLC circuit with resistance R, inductance L, and capacitance C. Derive an expression for the time-average power dissipated by the circuit
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