At a 200 meter swimming competition bill got a personal record of 45 secomda and time was 5 secomds faster then bill at the competition what was the speed of time for the swimmimg competition

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?