Chapter 6: Problem 144
Research and write a report on the power that humans produce in everyday life. Include the power produced by the brain when thinking and the heart when resting. Also select several strenuous activities such as trackand-field events, bicycle racing, and swimming. In each case, explain how the power is determined. Make a table to compare the various power outputs.
Short Answer
Step by step solution
Introduction to Power and its Measurement
Power Produced by the Brain
Power Produced by the Heart
Power Output in Strenuous Activities
Determine Power Output Calculation
Creating a Comparison Table
Conclusion
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Brain Power Consumption
- Your brain's power consumption arises from several biochemical processes. These involve neurons firing to process thoughts, manage emotions, maintain consciousness, and execute countless bodily functions.
- This power usage remains fairly constant because your brain is always active—deep in thought or simply maintaining vital physiological processes.
Heart Power Output
- The continual pumping ensures a steady blood circulation, distributing oxygen and nutrients to all cells.
- Power is determined by calculating the heart's work against arterial pressure over time, which is important for blood circulation efficiency.
Bicycle Racing Power
- Power meters attached to bicycle pedals help measure the cyclist’s power output. These devices capture data on the force applied and cadence (pedal speed).
- The energy generated not only propels the bicycle but also requires strategic energy management to optimize performance over race durations.
Sprinting Power
- This power output comes from rapid acceleration and high-intensity muscle contractions.
- Technologies like force plates and motion capture systems analyze the power by measuring acceleration and the ground force exerted by runners.
Swimming Power
- Professional swimmers develop substantial power through muscle force and streamlined techniques, enabling them to glide efficiently through water.
- To assess power, experts use force sensors and velocity measurements, considering factors like drag and stroke frequency.