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Physics
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Why?
Refraction
What is the refractive index?
The speed of light in a medium
The angle of incidence
The ratio of the sines of the angles of incidence and refraction
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Why?
Refraction
What is Snell's law?
The law of reflection
The law of refraction
The law of absorption
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Why?
Refraction
What is refraction?
The bending of light as it passes through a medium
The reflection of sound waves
The absorption of water waves
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Why?
Longitudinal wave
What type of waves are strictly transverse?
Longitudinal waves
Shear waves
Electromagnetic waves
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Why?
Longitudinal wave
What is the formula for the displacement of a point on a longitudinal sound wave?
y(x,t) = y0 sin(ω(t - x/c))
y(x,t) = y0 tan(ω(t - x/c))
y(x,t) = y0 cos(ω(t + x/c))
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Why?
Longitudinal wave
What are longitudinal waves also called?
Transverse waves
Shear waves
Compression waves
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Why?
Friction
What is the force that resists the motion of a fluid across the surface of a body called?
Dry friction
Fluid friction
Internal friction
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Why?
Friction
Who discovered the classic laws of sliding friction?
Aristotle
Vitruvius
Leonardo da Vinci
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Why?
Friction
What is the force that opposes the relative lateral motion of two solid surfaces in contact called?
Static friction
Kinetic friction
Fluid friction
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Why?
Heaviside step function
What is the integral of the Dirac delta function?
Zero
One
Heaviside step function
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