Answer:
refractive index for water,glass,diamond are 0.752m, 0.667m, 0.413m respectively
Explanation:
refractive index (n) = ![\frac{velocity of light in air/vacuum}{velocity of light in substance}](https://tex.z-dn.net/?f=%5Cfrac%7Bvelocity%20of%20light%20in%20air%2Fvacuum%7D%7Bvelocity%20of%20light%20in%20substance%7D)
velocity =![\frac{distance}{time}](https://tex.z-dn.net/?f=%5Cfrac%7Bdistance%7D%7Btime%7D)
The time for travel is kept constant for all mediums.
refractive index (n) = ![\frac{\frac{distance in vacuum}{time} }{\frac{distance in medium}{time} }\\ \\=\frac{distance in vacuum}{distance in medium}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Cfrac%7Bdistance%20in%20vacuum%7D%7Btime%7D%20%7D%7B%5Cfrac%7Bdistance%20in%20medium%7D%7Btime%7D%20%7D%5C%5C%20%5C%5C%3D%5Cfrac%7Bdistance%20in%20vacuum%7D%7Bdistance%20in%20medium%7D)
distance in medium = ![\frac{distance in vacuum}{refractive index of medium}](https://tex.z-dn.net/?f=%5Cfrac%7Bdistance%20in%20vacuum%7D%7Brefractive%20index%20of%20medium%7D)
![S_{medium} = \frac{S_{vacuum} }{n_{medium} }](https://tex.z-dn.net/?f=S_%7Bmedium%7D%20%20%3D%20%5Cfrac%7BS_%7Bvacuum%7D%20%7D%7Bn_%7Bmedium%7D%20%7D)
For water, n= 1.33
![S_{water} = \frac{1 }{1.33}](https://tex.z-dn.net/?f=S_%7Bwater%7D%20%3D%20%5Cfrac%7B1%20%7D%7B1.33%7D)
![S_{water} = 0.752m](https://tex.z-dn.net/?f=S_%7Bwater%7D%20%3D%200.752m)
For glass, n=1.5
![S_{glass}= \frac{1 }{1.5}](https://tex.z-dn.net/?f=S_%7Bglass%7D%3D%20%5Cfrac%7B1%20%7D%7B1.5%7D)
![S_{glass} = 0.667m](https://tex.z-dn.net/?f=S_%7Bglass%7D%20%3D%200.667m)
For diamond, n= 2.42
![S_{diamond} = \frac{1 }{2.42}](https://tex.z-dn.net/?f=S_%7Bdiamond%7D%20%3D%20%5Cfrac%7B1%20%7D%7B2.42%7D)
![S_{diamond} = 0.413m](https://tex.z-dn.net/?f=S_%7Bdiamond%7D%20%3D%200.413m)
Ans: <span>You should use the Perpendicular parking maneuver when the parking space is at a 90-degree angle to the curb.
</span><span>
You should use the perpendicular parking maneuver when the parking space is at 90-degree angle to the curb because It is as same as angle parking . When parking, the wheels of the vehicle should be stop straight and the vehicle centered in the parking space. Moreover, always use a forward reference point to avoid the hitting to the curb.</span>
Answer:
a) a = 91.4 m / s², b) t = 0.175 s, c)
Explanation:
a) This is a kinematics exercise
v² = vox ² + 2a (x-xo)
a = v² - 0/2 (x-0)
let's calculate
a = 16² / 2 1.4
a = 91.4 m / s²
b) the shooting time
v = vox + a t
t = v-vox / a
t = 16 / 91.4
t = 0.175 s
c) let's use Newton's second law
F = ma
F = 7.9 91.4
F = 733 N