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Suppose 33 mL of 1.20 MHCl is added to 42 mL of a solution containing excess sodium hydroxide, NaOH, in a coffee-cup calorimeter. The solution temperature, originally 25.0C, rises to 31.8C. Give the enthalpy change,H, for the reaction
HCl(aq) + NaOH(aq)à NaCl(aq) +H2O(l)
Express the answer as a thermochemical equation. For simplicity, assume that the heat capacity and the density of the final solution in the cup are those of water. (In more accurate work, these values must be determined.) Also assume that the total volume of the solution equals the sum of the volumes of HCl(aq) and NaOH(aq).
calculate the average signal-to-noise (SNR) in decibels (dB) Assume equal numbers of binary 0s and 1s.
Radio Systems, In design of radio systems that incorporate wireless networks, considerations must be taken such as user access, transmission direction, switching and signal strength.
Tell us about a time when you failed to meet a deadline. What were the repercussions?
Digital Communications, Order the following modulation types in terms of spectral efficiency (best to worse) and explain
Which of the following is not an advantage of SPI transmission over SCI transmission Error checking via parity bit Faster transmission Master-slave capability Synchronous transmission A HCS12 embedded timer is in PWM mode.
Given the following function: F(W,X,Y,Z) = fm(2,3,5,7,12,13). a. Implement the function using an 8-input multiplexer. b. Implement the function using a 4-input multiplexer.
A lighting load operates from a 208-V 60-Hz supply and is rated 1.0 kW with a power factor of 0.9 lagging. A 40-µF capacitor is connected in parallel with this load. Calculate the total power factor and the percent change in line current.
The boom AC is supported at A by a ball and socket joint and by two cables BDC and CE. Cable BDC is continuous and passes over a pulley at D. Calculate the tension in the cables and the x,y,z components of the reaction at A if the crate has a weig..
create a graph showing the relationship of an ideal gas between pressure (P) and temperature (T). The ideal gas law relates the pressure, volume, amount, and temperature of an ideal gas using the relationship: PV = nRT.
BJT Amplifiers Sketch an emitter-follower circuit with R1 = R2 = 50kohm ; RE = 2kohm. The collector of the npn transistor is connected to VCC = 5V and the input signal has an internal resistance, RS = 0.5kohm
Using the commonly available resistors, capacitors, and inductors, design a critically damped series RLC circuit (i.e., all three components are connected in series) with an undamped natural frequency of 20 krad/s.
A communication system must transmit the following real valued signal: v(t) = 4cos(2pi*10MHz*t) + 2cos(2pi*20MHz*t)+cos(2pi*30MHz*t)V For this signal, sketch the positive-frequency power specturm P(f>0)
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