Un atleta attraversa un fiume largo 100m alla velocità di 1.4 m/s, ma incontra una corrente di 0.80 m/s perpendicolare alla sua direzione. Quale distanza avrà percorso?

Awave travels at a speed of 5.2 m/s. if the distance between crests is 0.40 m, what is the frequency of the wave? use f=v/wavelength a. 13 hz b. 2.1 hz c. 0.077 hz d. 5.6 hz

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?

Properties seen when one one substance changes to another are known as properties