IMG_0553 : 無料・フリー素材/写真
IMG_0553 / ©HTO3
| ライセンス | クリエイティブ・コモンズ 表示-改変禁止 2.1 |
|---|---|
| 説明 | The dimension of power is energy divided by time. The SI unit of power is the watt (W), which is equal to one joule per second. Non-SI units of power include ergs per second (erg/s), horsepower (hp), metric horsepower (Pferdestärke (PS) or cheval vapeur, CV), and foot-pounds per minute. One horsepower is equivalent to 33,000 foot-pounds per minute, or the power required to lift 550 pounds by one foot in one second, and is equivalent to about 746 watts. Other units include dBm, a relative logarithmic measure with 1 milliwatt as reference; (food) calories per hour (often referred to as kilocalories per hour); Btu per hour (Btu/h); and tons of refrigeration (12,000 Btu/h). |
| 撮影日 | 2005-06-30 11:58:55 |
| 撮影者 | ©HTO3 , Troyeseffigy, the bully |
| タグ | |
| 撮影地 | |
| カメラ | Canon EOS DIGITAL REBEL XT , Canon |
| 露出 | 0.013 sec (1/80) |
| 開放F値 | f/3.5 |
| 焦点距離 | 50 mm |