In an L-R-C series circuit, R = 150 Ω, L = 0.750 H, and C = 0.0180 μ F. The source has voltage amplitude V = 150 V and a frequency equal to the resonance frequency of the circuit, (a) What is the power factor? (b) What is the average power delivered by the source? (c) The capacitor is replaced by one with C = 0.0360 μ F and the source frequency is adjusted to the new resonance value. Then what is the average power delivered by the source?
In an L-R-C series circuit, R = 150 Ω, L = 0.750 H, and C = 0.0180 μ F. The source has voltage amplitude V = 150 V and a frequency equal to the resonance frequency of the circuit, (a) What is the power factor? (b) What is the average power delivered by the source? (c) The capacitor is replaced by one with C = 0.0360 μ F and the source frequency is adjusted to the new resonance value. Then what is the average power delivered by the source?
In an L-R-C series circuit, R = 150 Ω, L = 0.750 H, and C = 0.0180 μF. The source has voltage amplitude V = 150 V and a frequency equal to the resonance frequency of the circuit, (a) What is the power factor? (b) What is the average power delivered by the source? (c) The capacitor is replaced by one with C = 0.0360 μF and the source frequency is adjusted to the new resonance value. Then what is the average power delivered by the source?
Steel train rails are laid in 13.0-m-long segments
placed end to end. The rails are laid on a winter
day when their temperature is -6.0° C.
Part A
How much space must be left between adjacent rails if they are just to touch on a summer day when their
temperature is 32.0°C?
Express your answer with the appropriate units.
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D =
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Part B
If the rails are originally laid in contact, what is the stress in them on a summer day when their temperature is
32.0°C?
Express your answer in pascals. Enter positive value if the stress is tensile and negative value if the
stress is compressive.
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A
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help me with this and the step I am so confused. It should look something like the figure i shown
Part A
In an effort to stay awake for an all-night study
session, a student makes a cup of coffee by first
placing a 200 W electric immersion heater in
0.250 kg of water.
How much heat must be added to the water to raise its temperature from 20.5° C to 95.0°C?
Express your answer in joules.
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How much time is required? Assume that all of the heater's power goes into heating the water.
Express your answer in seconds.
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