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Understanding Electrical TransmissionDemonstration E1 A Guide to the National Grid Transmission Model Demonstration E1 Monitoring the National Grid frequency

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Understanding Electrical TransmissionDemonstration E1 A Guide to the National Grid Transmission Model Task 1 Measuring the mains frequency 1. What is the value of the highest frequency over the measurement period? What is the value of the lowest frequency? 2. What are the upper and lower limits of the frequency that the National Grid must maintain by law? 3. What are the values of the upper and lower operating limits? 4. Look at the graph of the data collected. Does the frequency lie between these limits?

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Understanding Electrical TransmissionDemonstration E1 A Guide to the National Grid Transmission Model Task 2 Comparison with data from the National Grid 5. Compare the current value of frequency on the multimeter with that shown on the website. Are they the same? 6. Compare the real-time website graph with the graph of the data collected in the previous task. Do the patterns match? 7. What are the possible reasons that the frequency might increase? 8. What are the possible reasons that the frequency might decrease?

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EXAMPLE 1 Solve an equation with two real solutions Solve x 2 + 3x = 2. x 2 + 3x = 2 Write original equation. x 2 + 3x – 2 = 0 Write in standard form.

EXAMPLE 1 Solve an equation with two real solutions Solve x 2 + 3x = 2. x 2 + 3x = 2 Write original equation. x 2 + 3x – 2 = 0 Write in standard form.

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