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Using the graph of Energy Used per Meter vs. Speed for running and walking: at what speed $s$ (in miles per hour) is the energy used per meter during running exactly twice the energy used per meter during walking? Based on the graph, $s$ lies between:
From the Energy vs. Speed graph:
- The walking curve rises gradually from about 75 J/m at low speed to roughly 150 J/m around 4–5 mph.
- The running curve starts high (~150 J/m at low speed) and decreases to a minimum around 4 mph, then rises again.
We look for the speed where the running energy is exactly double the walking energy. By reading the graph carefully:
At $s \approx 2.7$ mph: running energy ≈ 150 J/m, walking energy ≈ 75 J/m. Running = 2 × walking. ✓
This speed falls in the range 2.5 to 3.0 mph.
Rogers' Three Principles of Homeodynamics:
| Principle | Description |
|---|---|
| Integrality | Continuous, mutual, simultaneous interaction between the human energy field and environmental energy field |
| Resonancy | Continuous change from lower to higher frequency wave patterns in human and environmental fields |
| Helicy | Continuous, innovative, unpredictable, increasing diversity of human and environmental field patterns |
Rogers viewed humans as irreducible, indivisible energy fields in constant interaction with the environment — a revolutionary concept in nursing theory that underpins holistic care.
The recorded value $3.50 \text{ cm}$ has a precision of $0.01 \text{ cm}$. We must find an instrument with a least count (LC) of $0.01 \text{ cm}$.
- Option A: $LC = \frac{1 \text{ mm}}{100} = 0.01 \text{ mm} = 0.001 \text{ cm}$
- Option B: $LC = \frac{1 \text{ mm}}{50} = 0.02 \text{ mm} = 0.002 \text{ cm}$
- Option C: $LC = 0.1 \text{ cm}$
- Option D: $1 \text{ MSD} = \frac{1 \text{ cm}}{10} = 0.1 \text{ cm}$. Since $10 \text{ VSD} = 9 \text{ MSD}$, $1 \text{ VSD} = 0.9 \text{ MSD}$. $LC = 1 \text{ MSD} - 1 \text{ VSD} = 0.1 \text{ MSD} = 0.01 \text{ cm}$.
Thus, Option D matches the required precision.
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