Answer:
The refractive index of the plastic, n₂ is between 0.73696 and 0.85034
Explanation:
Here we have;
Snell's law which is the relationship of the refractive index of light in two media. The law, in mathematical terms, states the ratio of the refractive index of light between two media is inversely proportional to the ratio of the sine of the angle of incidence to the sine of the angle of refraction.
That is the sine of the angle of incidence and the sine of the angle of refraction are inversely proportional.
0.79365 ± 0.05669
If θ₂ = Angle inside the plastic object and
θ₁ = Angle outside the plastic object
n₁ = Refractive index of air outside the plastic = 1
n₂ = Refractive index of the plastic
Therefore, , which gives;
∴ 0.73696 ≤ n₂ ≤ 0.85034.
The refractive index of the plastic, n₂ is between 0.73696 and 0.85034.
<h2>The initial velocity is 2.3
</h2>
Explanation:
Suppose the speed of car at point A is u .
Its kinetic energy K = mu²
At point B , its kinetic energy = K
and its gravitational potential energy = K = m g h = 2 m g R
here height h = 2 R ( radius of circle )
From the principle of conservation of energy
m u² = m u² + 2 m g R
m u² = 2 m g R
Therefore u = = 2.3
<span>The force of gravity between a planet and a person or object on
its surface is called the person or object's weight on that planet.
The planet's weight on the person or object is exactly the same number,
because gravity always acts as an equal pair of forces ... one in each direction.
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Answer:
simple machines such as ramps lessen the moment required to do work. if a triangle has a base of 5 and the height is 7, a ramp would make the hypotenuse of this triangle lessoning the total distance. using a²+b²=c² 25+49=c² 74≈8.6 and it is obvious that 8.6 is less than 12 in every unit. other simple machines such as pulleys make it lighter making it simply easier for an object to be lifted.
Explanation: