A gardener uses 1600 J of work to push a wheelbarrow for 45 seconds. How much power does she use?
O A. 35.6 W
O B. 69.7 W
O C. 29.2 W
O D. 43.8 W

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Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

An object's buoyant force and weight mean the same thing.a. trueb. false