Carbon can have 6, 7 or 8 neutrons.
how would you write their names?

carbon-12

carbon-13

carbon-14

Explanation:

This is because carbon atoms with the usual 6 neutrons have a mass number of 12 (6 protons + 6 neutrons = 12)., while carbon atoms with 7 neutrons have an atomic mass of 13 (6 protons + 7 neutrons = 13). Based off of this, the carbon atom with 8 neutrons will most likely have a mass number of 14.

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