I SAID don’t copy from internet but u did
Explanation:
Answer:
A composite material can combine the best properties of different materials.
Explanation:
For example, plastic doesn’t look too nice, isn’t easy to clean, and sometimes affects taste. So, combining wood with plastic helps overcome the cons of plastic while keeping the pros of wood. The composite material is lightweight and is hard to break or dent.
Answer:
It's a strength or force
Explanation:
the quantity of motion of a moving body, measured as a product of its mass and velocity
Answer:
True.
Explanation:
The kinetic energy and potential energy are equal when an objects falls as its potential energy is converted into kinetic energy.
You can use Snell's Law that relates the angles of the ray in the clear plastic and in the air to the ratio of their refraction indexes (n):
![\frac{n_{plastic}}{n_{air}} =\frac{\sin\theta_{air}}{\sin\theta_{plastic}}](https://tex.z-dn.net/?f=%5Cfrac%7Bn_%7Bplastic%7D%7D%7Bn_%7Bair%7D%7D%20%3D%5Cfrac%7B%5Csin%5Ctheta_%7Bair%7D%7D%7B%5Csin%5Ctheta_%7Bplastic%7D%7D)
If you measure the two angles by experiment, then you can calculate the index of refraction of the clear plastic:
![n_{plastic} =n_{air}\cdot\frac{\sin\theta_{air}}{\sin\theta_{plastic}}=1.0\cdot\frac{\sin\theta_{air}}{\sin\theta_{plastic}}](https://tex.z-dn.net/?f=n_%7Bplastic%7D%20%3Dn_%7Bair%7D%5Ccdot%5Cfrac%7B%5Csin%5Ctheta_%7Bair%7D%7D%7B%5Csin%5Ctheta_%7Bplastic%7D%7D%3D1.0%5Ccdot%5Cfrac%7B%5Csin%5Ctheta_%7Bair%7D%7D%7B%5Csin%5Ctheta_%7Bplastic%7D%7D)