Trey is conducting an experiment to determine which fish food causes the most goldfish activity over a period of two weeks. he is going to set up ten fish tanks with 4 goldfish each. he will feed the fish in half of the tanks swift salmon food and the fish in the other half of the tanks fast flounder food. he will expose them to direct sunlight for 4 hours per day. each tank will have the same size and type of goldfish, which will be fed the same amount of fish food. each tank will be filled with the same type and amount of water and with the same type and amount of river rock.

i don't think the actual question was made clear in the text. would you be able to rewrite it but including the question? i could see if i can you then : )

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.