Life changes that limit one's ability to make independent choices or improve the self tend to cause stress most for individuals in cultures.

uranium fissions/breaks up giving out energy and neutrons

so easy. just google the electromagnetic waves and it’ll pop up.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.