Physics, 22.12.2019 18:31, Meliiiii

Match the description to the proper category to differentiate reflection and refraction

1) speed of ray does not change

2) ray bounces off a boundary

3) direction found by law of reflection

4) direction found by snells law

5)speed of ray changes

6) ray passes through a boundary

Answers: 2

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answered: pineapplepizaaaaa

Reflection - 1) speed of ray does not change ,

2) ray bounces off the boundary , 3) Direction found by law of reflection

Refraction - 4) direction found by Snell's law , 5) speed of ray changes .

Explanation:

In reflection , the reflected ray will bounce off the reflecting surface , in a direction opposite to the direction of the incident wave, in the same plane as the incident wave.

But in refraction, bending of the light ray occurs when there is a change in the medium in which the light ray travels. The laws of refraction as given by Snell's law are followed for refraction. Speed of the light ray changes since there is an interaction of the ray with the particles of the medium separating the two media.

answered: nyahdrake

The picture below for people on Edgenuity

Explanation:

$Match the description to the proper category to differentiate reflection and refraction 1) speed of$

answered: Guest

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

$p(t)=0.3t^2+6t+80$

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

$p(0)=0+0+80=80$

according to question, we have said that if the population has twice its initial population, then it becomes

$p(t)=2\times 80=160$

so, time taken to reach this above mentioned population is given by

$160=0.3t^2+6t+80\\\\160-80=0.3t^2+6t\\\\80=0.3t^2+6t\\\\0.3t^2+6t-80=0\\\\\text{using quadratic formula ,we get }\\\\t_{1,\: 2}=\frac{-60\pm \sqrt{60^2-4\cdot \: 3\cdot \: 800}}{2\cdot \: 3}\\\\t=-29.14\ and\ t=9.149$

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

answered: Guest

Is a vector quantity that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.