Intro
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| P = Fv cos θ | P = F · v |
| power (W) | device, phenomena, process, event |
|---|---|
| gamma ray burster | |
| 3.6 × 1039 | typical quasar |
| 3.6 × 1026 | the sun |
| 1.25 × 1015 | most powerful laser (Petawatt) |
| 1.3 × 1013 | total human consumption, global |
| 3.2 × 1012 | total human consumption, US |
| 1.2 × 1010 | space shuttle at launch |
| 109 ~ 1010 | large commercial power plant |
| 4,700,000 | most powerful locomotive (GE AC6000 CW) |
| 783,000 | most powerful truck (Terex TR100) |
| 468,000 | most powerful car (McLaren F1) |
| 10,000 | Watt's steam engine of 1778 |
| 746 | 1 horsepower |
| 100 | human, daily average |
| 0.293 | 1 btu/h |
| 10−5 | human, sounds produced during normal speech |
The kilowatt-hour is a unit of energy used by electrical utilities.
The Btu per hour (often erroneously shortened to Btu) is a unit of power used by the heating, ventilation, and cooling industry (HVAC).
A horsepower is a unit of power sufficient to raise 33,000 pounds 1 foot every 1 minute (550 lbs, 1 ft, 1 sec) equivalent to roughly 745.70 W
physiology
| power(W) | activity |
|---|---|
| 800 | playing basketball |
| 700 | cycling (21 km/h) |
| 685 | climbing stairs (116 steps/min) |
| 545 | skating (15 km/h) |
| 475 | swimming (1.6 km/h) |
| 440 | playing tennis |
| 400 | cycling (15 km/h) |
| 265 | walking (5 km/h) |
| 210 | sitting with attention focused |
| 125 | standing at rest |
| 120 | sitting at rest |
| 83 | sleeping |
| Source: | Physics of the Body |
| organ |
mass (kg) |
power (W) |
power density (W/kg) |
% of total |
|---|---|---|---|---|
| liver & spleen | – | 23 | – | 27 |
| brain | 1.40 | 16 | 11 | 19 |
| skeletal muscles | 28.00 | 15 | 0.55 | 18 |
| kidneys | 0.30 | 9.1 | 30 | 10 |
| heart | 0.32 | 5.6 | 17 | 7 |
| remainder | – | 16 | – | 19 |
| total | 65 | 85 | – | 100 |
| Source: | Physics of the Body |
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The Physics Hypertextbook © 1998–2013 Glenn Elert |
No condition is permanent.