The ultimate fate of our universe depends on its mass. true or false.

True

Explanation:

Since the formation of the universe, over the 13.8 billion years, universe has become less dense. It is the ever expanding nature of the universe that is causing it to become less dense. This expansion will eventually pull apart the  planets , stars and galaxies to such an extent that there will no longer be enough raw material for the star formation.

The average motion of the galaxies, the amount of dark matter and dark energy that the universe contains will all determine the fate of the universe.

explanation:

could i give you a exaplo that could you?

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s