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Fifth Physics(Double): Challenging Waves
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Gravity
Terms in this set (34)
Definition of amplitude is...
the maximum displacement from the midpoint
Definition of time period is...
the time it takes for one wave to pass
Waves transfer ________ without transferring matter
energy and information
What is the equation that links the frequency and period of a wave?
f = 1 / T
What is the wavelength of a wave?
The distance the wave travels in one complete oscillation
What is a longitudinal wave?
A wave where the direction of oscillation is parallel to the direction of energy transfer.
What is the frequency of a wave?
The number of complete oscillations that happen in one second
What is a transverse wave?
A wave where the direction of oscillation is perpendicular to the direction of energy transfer.
What equation gives the speed of a wave?
wave speed = frequency x wavelength ( v = f x λ )
Which part of the EM spectrum is used for broadcasting and communications?
Radio waves
Uses of microwaves
Cooking and satellite transmissions
Uses of infrared radiation
Heaters and night vision equipment
Uses of visible light
Optical fibres and photography
Fluorescent lamps are a use of which EM wave?
Ultraviolet
Uses of x-rays
Observing the internal structure of objects and materials and medical applications
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Verified questions
PHYSICS
A person climbs from a Paris metro station to the street level by walking up a stalled escalator in 94 s. It takes 66 s to ride the same distance when standing on the escalator when it is operating normally. How long would it take for him to climb from the station to the street by walking up the moving escalator?
PHYSICS
The blood pressure at your heart is approximately 100 mm Hg. As blood is pumped from the left ventricle of your heart, it flows through the aorta, a single large vessel with a diameter of about 2.5 cm. The speed of blood flow in the aorta is about 60 cm/s. Any change in pressure as blood flows in the aorta is due to the change in height: the vessel is large enough that viscous drag is not a major factor into successively smaller and smaller blood vessels until it reaches the capillaries. Blood flows in the capillaries at the much lower speed of approximately 0.7 mm/s. The diameter of capillaries and other small blood vessels is so small that viscous drag is a major factor. Because the flow speed in your capillaries is much less than in the aorta, the total cross-section area of the capillaries considered together must be much larger than that of the aorta. Given the flow speeds noted, the total area of the capillaries considered together is equivalent to the cross-section area of a single vessel of approximately what diameter? A. 25 cm B. 50 cm C. 75 cm D. 100 cm
PHYSICS
Consider a Lagrangian of the form $$ L=\frac{1}{2} m\left(\dot{x}^{2}-\omega^{2} x^{2}\right) e^{\gamma t} $$ where the particle of mass m moves in one direction. Assume all constants are positive. (a) Find the equations of motion. (b) Interpret the equations by giving a physical interpretation of the forces acting on the particle. (c) Find the canonical momentum and construct the Hamiltonian. Is this Hamiltonian a constant of the motion? (d) If initially x(0) = 0 and dx/dt = 0, what is x(t) as t approaches large values?
PHYSICS
A thin soap bubble of index of refraction 1.33 is viewed with light of wavelength 550.0 nm and appears very bright. Predict a possible value of the thickness of the soap bubble.