In a lab experiment, a student is trying to apply the conservation of momentum. two identical balls, each with a mass of 1.0 kg, roll toward each other and collide. the velocity is measured before and after each collision. the collected data is shown below.

a 5 column table with 3 rows. the first column is unlabeled with entries trial 1, trial 2, trial 3, trial 4. the second column is labeled initial velocity ball a (meters per second) with entries positive 1, positive 0.5, positive 2, positive 0.5. the third column is labeled initial velocity ball b (meters per second) with entries negative 2, negative 1.5, positive 1, negative 1. the third column is labeled final velocity ball a (meters per second) with entries negative 2, negative 0.5, positive 1, positive 1.5. the fourth column is labeled final velocity ball b (meters per second) with entries negative 1, negative 0.5, negative 2, negative 1.5.

which trial shows the conservation of momentum in a closed system?

trial 1
trial 2
trial 3
trial 4

i can’t include the pic of the chart, hurry, marking branliest if it’s correct

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

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Anybody wanna ? (picture included? )