A sleigh weighs 2000 N and is pulled by a horse a distance of 1.0 km (1000 m) in 45 minutes.

What is the power of the horse?

45min * 60 s/min = 2700s  

Power = Work(in joules)/Time(in seconds)  

Power = (2000N * 1000m)/2700s  

Power = 740.74W or about 1 Horse Power. 0.993348703 hp to be exact

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.