Two people fell down, one onto hard cement and one onto softer grass. Both people had a mass of 100 kg and were moving at 4 m/s as they fell. The person who hit the hard cement came to a complete stop very quickly, in .01 seconds. The person who fell onto the softer grass also came to a complete stop, but they did so more slowly, 0.5 seconds. What force did each of them experience when they came to a stop? Force on person who fell on cement Newtons Force on person who fell onto grass Newtons

you go to your settings preference and in the end youll see sth that says "i want to delete my acc" click on it and u'll acc will be deleted but u have to wait.

1.   what is light?

light is an electromagnetic wave visible to the human eye. 

2. what is a reflection?

the rebounding of a light ray when it hits a mirror.

3. what is the incident ray?

contacts the surface of an object.

4. what is the reflected ray?

bounces off a reflective surface.

5. what is the normal ray?

perpendicular to the surface of a mirror.

6. what is the angle of incidence?

an angle formed by the incident ray and the normal.

7. what is the angle of reflection?

an angle formed by the reflected ray and the normal.

8. what is refraction?

(bending.)

9. what is a converging lens?

bring together light rays that pass through.

10. what is a diverging lens?

spreads out light passing through.

11. focal point?

the real point where the refracted rays meet when the incident rays run parallel.

i copy pasted btw from an website..