Pentru încălzirea apei (c apă = 4 180 J/kg·K) cu Δt = 80 °C se folosește o instalație de încălzire în care se arde o masă m = 6,2 g de alcool etilic, cu puterea calorică q = 27

MJ/kg. Știind că pierderile de căldură sunt de 40%, determină masa de apă care a

fost încălzită.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

the force represented by vector a is normal force. if the hockey puck is moving to the right, when it is hit with a significant force by the hockey stick the puck will move off in a different direction. correct on edge.