Uma força age sobre um objeto de 7,1 kg, que pode ser tratado como uma partícula, de tal forma que a posição do objeto em função do tempo é dada por x = 3,0 t – 4,0 t2 + 1,0 t3, com x em metros e t em segundos. Determine o trabalho realizado sobre o objeto de t = 0s até t = 4 s.

Asample of a gaseous substance changes into a liquid

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.