The correct option is D.
The critical angle is defined as the angle of incidence, which provides an angle of refraction of 90 degree. At any angle of incidence greater than the critical angle, all the light will totally reflected, resulting in total internal reflection.Thus, the critical angle is equal to the refractive index.
the answer is 5000, multiply 500 by 10.
Answer:
Approximately .
Explanation:
Let denote the distance between the hikers and the mountain.
The sound wave from the hikers need to travel a distance of to reach the mountain. The echo comes back at the hikers almost immediately after that and would need to travel the same distance, , to reach the hikers.
Hence, the between the shout and the echo is the time it takes for sound to travel a distance of - twice the distance between the hikers and the mountain.
Distance that sound travels in :
.
The distance between the hikers and the mountains would be:
.
Answer:
The thermal conductivity
Explanation:
From the question we are told that
The depth of the thermocouple from the surface is x = 10 mm = 0.01 m
The temperature is
The initial temperature is
The temperature of the thermocouple after t = 2 minutes( 2 * 60 = 120 \ seconds) is
The density of the material is
The specific heat of the solid
Generally the equation for semi -infinite medium is mathematically as
Here is a constant with unit
this is from the Gaussian function table
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Generally the thermal conductivity is mathematically represented as