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Concept explainers
The following data gives the approximate population of the world for selected years from 1850 until 2000.
Year |
The population, P, since 1900 can be modeled by the logistic
whereP is in billions and t is years since 1850. Make a plot of population versus years. The figure should show the information from the table above as data points and the population modeled by the equation as a solid line. Set the
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Chapter 5 Solutions
EBK MATLAB: AN INTRODUCTION WITH APPLIC
- 1. An electrical circuit consist of a series connected resistor (100 ohms) and a coil with inductance of 50 H. If the initial DC source is 200 volts, solve for the current at 2 seconds. 2. A population of a small city had 3000 people in the year 2000 and has grown at a rate proportional to its size. In the year 2005 the population was 3700. Estimate the population of the city in 2006 and in 2010.arrow_forwardDetermine the mean value of the life of an electric light bulb . (see picture for question). help me to solve this and show step by step working on how to perform the integral.arrow_forwardThe rms output voltage of an AC source is 150 V and the operating frequency is 90 Hz. Which of the following equation gives the output voltage as a function of time? a. (150 ?) sin(283?)b. (150 ?) sin(565?)c. (212 ?) sin(283?)d. (212 ?) sin(565?)arrow_forward
- Please provide Handwritten answer. Electrical Engineering kindly show the explanation why we divide n/Fs when plotting and what is wnarrow_forwardA garage is illuminated by a single incandescent light bulb dangling from a wire. The bulb radiates light uniformly in all directions and consumes an average electrical power of 100 W. Assume that 5.00% of the electrical power consumed by the bulb is converted to light. (a) (b) What is the average intensity of the light at a distance of 2.00 m from the bulb? What are the rms values of E and B at a distance of 2.00 m from the bulb? Calculate the energy density of the light in J/m.arrow_forward1. Following table, illustrate time x an employee spent in years for a typical company versus his/her hourly pay y in dollars. Find average amount of years employee spent in a company and average hourly pay. Also, find the coefficient of correlation between these quantities. X (time in years) 3 4 5 10 15 20 Y (hourly salary) 15 17 22 33 37 40arrow_forward
- A large electric utility company spews 62 million tons of greenhouse gases (mostly carbon dioxide) into the environment each year. This company has committed to spending $1.2 billion in capital over the next five years to reduce its annual emissions by 5%.More will be spent after five years to reduce greenhouse gases further. Solve, a. What is the implicit cost of a ton of greenhouse gas? b. If the United States produces 3 billion tons of greenhouse gases each year, how much capital must be spent to reduce total emissions by 3% over the next five years based on your answer in Part (a)?arrow_forwardUsing the measured values, write the equation of the voltage across 12Voutput voltage terminals as a function of time.arrow_forwardC = 93 | F = 14 | G = 39 | S = 85 For the sinewave, give the following six values. Must give the UNITS after each number. a. Vp (the peak voltage) b. Vpp (the peak-to-peak voltage) c. B (the DC bias or DC offset) d. T (the period) e. f (note that f will be a number of Hertz between 0 and 1 and your answer might have to be rounded OR you can choose to write it as a fraction), and f. θ, which is the phase shift in degrees in the expression Vpsin(ωt - θ) + B Vp = Vpp = B = T = f = θ =arrow_forward
- A car traveling along a straight road increases its speed from 30.0 m/s to 50.0 m/s in a distance of 360 m. If the acceleration is constant, how much time elapses (s) while the ca this distance? 1. 06 2. 07 3. 08 4. 09 5. o10arrow_forward6. Determine the average power of the signal a[n] x[n] 2 1 0 -1 -12 Time n 12 where the repeated pattern shown in the plot is endlessly repeated in the past and future and the units of r[n] are kilograms. Include the units.arrow_forwardAn example power system has two distinct manufacturing areas, one with harmonic loads, and another with only linear loads. The portion of the system with the harmonic loads draws 75 A rms at 60 Hz, 10 A rms at 300 Hz, and 5 A rms at 420 Hz. The part of the system with only linear loads draws 75 A rms at 60 Hz. (i) What is the total load current (at 60 Hz) if both manufacturing plants are running? Calculate the THD. (ii) What is the total load current (at 60 Hz) if only the manufacturing plant with harmonic loads is running? Calculate the THD.arrow_forward
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