In the process of nuclear fusion, large amounts of energy, at temperatures of approximately 120 million kelvin, are required to join two nuclei into a single, heavier nucleus. why does the process of fusion require so much energy in order to take place?
a) to allow the electrons to enter the nucleus
b) to remove the electrons from the electron clouds
c) to cause the two nuclei to slow down and find each other
d) to overcome the electrostatic forces between opposing nuclei

its c its is a mixture of gases

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