One horsepower (1 hp) is the unit of power based on the work that a horse can do in one second. this is defined, in english units, as a force of 550 lb that can move an object 1 foot in 1 s. in si, 1 hp equals 745.7 w, or 745.7 j of work delivered in 1 s. suppose you have a horse that delivers 745.7 w of power, but that it does the work in only 0.55 s. how much work has this horse done?

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

Carbon 14 is a naturally occurring stable

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?