please please help Suppose you are going on a car trip with your family.

Physics

1 answer:

Strike441 [17]3 years ago

3 0

Answer:

1. To determine the average speed for the first day of the trip, the total distance traveled would have to be acquired and then how long it took to arrive at the final destination, only including the time that was actually traveled and not any time that was accumulated by any rest stops. Once you have this information, you have to divide the distance over time and you have the average speed (mph).

2. To determine the instantaneous speed, you would just have to look at the speedometer, which tells you at what speed the car is traveling at that exact moment.

Explanation:

I took physics 121 and got the same question. This is my answer that i used and my teacher said it was right.

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Find the angle of incidence at which a light beam traveling from a medium having the index of refraction n1 = 2.7 to another med

luda_lava [24]

Answer:

The angle of incidence at which total internal reflection takes place will be equal to $\Theta _c=36.34^{\circ}$

Explanation:

We have given that light is traveling from a medium of refractive index x 2.7 to a medium of refractive index 1.6

So refractive index of first medium $n_1=2.7$ and $n_2=1.6$

We have to find the angle of incidence for total internal reflection

For total internal reflection

$n_1sin\Theta _c=n_2sin90^{\circ}$

$\Theta _c=sin^{-1}\frac{n_2}{n_1}$

$\Theta _c=sin^{-1}\frac{1.6}{2.7}$

$\Theta _c=36.34^{\circ}$

So the angle of incidence at which total internal reflection takes place will be equal to $\Theta _c=36.34^{\circ}$

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3 years ago

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iris [78.8K]

If we take v=u+at and our given values are:

v=final velocity 20m/s

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