Which statements accurately describe atoms? check all that apply. atoms cannot be divided. there are only a few different types of atoms. a single atom can be seen using a standard microscope. atoms were named in the fifth century bce. atoms are the smallest unit of matter.

The answers are:

- Atoms cannot be divided.

- Atoms were named in the fifth century BCE

- Atoms are the smallest unit of matter.

Explanation:

The atom is the smallest constituent unit of matter that has the properties of a chemical element, that is, an atom is the smallest amount of a chemical element that has its own existence and is considered indivisible. Each solid, liquid, gas and plasma is composed of neutral or ionized atoms. The concept of atom as a basic and indivisible block that composes the matter of the universe was postulated by the atomist school in Ancient Greece, in the 5th century BCE, being Democritus one of its exponents.

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