A moving train comes to a stop at the station. What happened to make the train change motion?

1)The train experienced an unbalanced force.

2)The train experienced a balanced force.

3)The train would stop with or without forces.

4)The train does not experience forces acting on it.

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

Dona wrote the characteristics of two types of galaxies as shown below: type a: has a large flattened core type b: does not have a regular shape which statement is correct? type a is an irregular galaxy and type b is a lens galaxy. type a is a lens galaxy and type b is an irregular galaxy. type a is a spiral galaxy and type b is an elliptical galaxy. type a is an elliptical galaxy and type b is a spiral galaxy.