Ahelium atom consists of two protons, two
electrons, and two neutrons. in the helium atom,
the strong force is a fundamental interaction
between the
(1) electrons, only
(2) electrons and protons
(3) neutrons and electrons
(4) neutrons and protons

(4) neutrons and protons

Explanation:

there exist four fundamental interaction force as following

1). Gravitational force

2) Electromagnetic force

3). Weak Nuclear force

4). Strong Nuclear force

So here we have to find the strong force between the subatomic particles which will have strongest force

So here all interaction between charge particles are always electromagnetic force which is always weaker than nuclear force

So here we can say that the strongest force will be force between neutrons and protons as the force between them is always strong nuclear force due to which they resides into a small space known as nucleus

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

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