Four vehicles are traveling on the same road. Which vehicle most likely has the greatest kinetic energy? a compact car traveling
2 answers:
Answer:
a pickup truck traveling at a velocity of 25 m/s
Explanation:
The kinetic energy of an object is given by:
where
m is the object's mass
v is its speed
Therefore, the larger the mass and the speed of the object, the greater its kinetic energy.
Among the choices given, the object with larger mass is for sure the pickup truck; also, it is the object with larger speed (25 m/s), therefore it must be also the object with greater kinetic energy.
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Complete Question:
A beam of white light is incident on the surface of a diamond at an angle , since the index of refraction depends on the light's wavelength, the different colors that comprise white light will spread out as they pass through the diamond. For example, the indices of refraction in diamond are
for red light and
for blue light. Thus, blue light and red light are refracted at different angles inside the diamond. The surrounding air has
.
Now consider θc, the angle at which the blue refracted ray hits the bottom surface of the diamond. If θc is larger than the critical angle θcrit, the light will not be refracted out into the air, but instead it will be totally internally reflected back into the diamond. Find θcrit. Express your answer in degrees to four significant figures.
Answer:
Explanation:
Only the blue refracted ray is related to the critical angle in this question
The relationship between the critical angle(),
and
can be given as