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maks197457 [2]
3 years ago
7

Which type of reaction occurs without being started by some outside force?

Physics
1 answer:
Nostrana [21]3 years ago
8 0
A spontaneous reaction is a term that is best describe to a type of reaction wherein it is started without even with the help of an outside force. In addition to that, this kind of reaction is commonly driven by the forces of enthalpy and entropy which are essential concepts to thermodynamics.
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What is the equation used to find the image distance? Identify each variable
zysi [14]

Answer:i f I understand your question correctly, the formula is as follows:

Note: The sign convention is based on distances which are measured from the lens to the object or image of regard. Distances measured in the same direction the light is moving are positive and distances measured in the opposite direction the light is moving are negative.

The measurements are in meters

The “ambient” index of refraction is assumed to be n=1.00

The inverse of the object distance plus the dioptric power of the lens (convex—positive and concave—negative) equals the inverse of the image distance.

Or 1/Od +Dl =1/Id

Please note, it has been a long time since I thought about teaching this concept to students.

<h3>Hope this helps have a awesome day/night❤️✨</h3>

Explanation:

4 0
3 years ago
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A beam of light strikes a sheet of glass at an angle of 57.0°. with the normal in air. You observe that red light makes an angle
Lena [83]

Answer:

a) Red: 1.34

Violet: 1.40

b) Red: 2.23\times10^8\frac{m}{s}

Violet: 2.14\times10^8\frac{m}{s}

Explanation:

a) We should use Snell's law to find the index of refraction:

n_{1}sin\theta_{i}=n_{2}sin\theta_{t}

with n1 the index of refraction of air, n2 the index of refraction of the glass, θi the angle of the incident ray respects the normal an θt the angle between the refracted ray an the normal. It's common to approximate n1=1

solving n2 for red light:

\frac{sin\theta_{i}}{sin\theta_{t}}=n_{2}

n_2=\frac{sin57.0}{sin38.1}= 1.34

solving n2 for violet light:

\frac{sin\theta_{i}}{sin\theta_{t}}=n_{2}

n_2=\frac{sin57.0}{sin36.7}= 1.40

b) Index of refraction on a medium is defined as the ratio between the velocity of electromagnetic waves on vacuum (velocity of light c) and the velocity in medium (v):

n_2=\frac{c}{v}

solving v for red:

v=\frac{c}{n_2}=\frac{3\times10^8}{1.34}=2.23\times10^8\frac{m}{s}

solving v for violet

v=\frac{c}{n_2}=\frac{3\times10^8}{1.40}=2.14\times10^8\frac{m}{s}

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<span>It acts as a sunscreen to </span>protect us<span> against UV radiation. </span>
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The second option rolling friction
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Genetically-Modified Organisms (GMOs) are currently being developed for agriculture. Currently commercialized GM crops in the U.
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(Not sure if you had D eliminated or? But it should be the correct answer)
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