Ompare the mass of an ice cube to the mass of the water once the cube is completely melted. a) the mass of water formed equals the mass of ice. b) the mass of water formed is more than the mass of ice. c) the mass of water formed is less than the mass of ice. d) the mass of water formed does not depend on the mass of ice.

Your answer here is A.

Explanation:

Water expands when it freezes, but that doesn't mean you get more water after freezing water, and then unfreezing it.

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.

higher potential

explanation:

because it is in a high speed so it must move into a of high potential