Physics Unit 8 test
Equilibrium
A position of________ in a pendulum means that there is no actual force in effect
amplitude
At maximum __________the potential energy of a pendulum is maximum
Ultraviolet
Exposure to _________ light causes the body to produce vitamin D
decibels
Loudness is measured in ______
infrasonic
Sounds below 20 Hz are called __________
true
The electrical and magnetic fields of an electromagnetic wave are perpendicular to each other and to the direction of travel.
Composite
The light produced by the sun is a __________ white light made up of other colors of light
Doppler
The_______ effect is the phenomenon of a changing between source and hearer
interfere
Two waves traveling along the same line will_____ with eachother
Gamma
___________ rays can both cause cancer and be used in it treatment
Microwaves
___________excite water molecules in the food to cook from the inside
normal
a line that is perpendicular to a surface called a______ line
Simple harmonic motion
a regular repeated motion caused by the exchange of energy from potential to kinetic and back again is called_______
Sound
an example of a mechanical wave is a ______ wave
Increases
as wavelength decreases frequency _________
decreases
as wavelength increases frequency_______
Maximum
at equilibrium in a pendulum, the potential energy is zero and the velocity is______
angles
different wave lengths are refracted at different ______
Radio
electromagnetic waves with the lowest frequencies are ____________
toward
if a light wave enters a medium having a higher index of refraction than the medium it is leaving, the light wave will bend_______ the normal line
Spring constant
in a spring, the period of oscillation depends on the mass and the_________
Reflect
leaves turn green because the leaves_____Green light
Longitudinal
sound waves radiate in spherical_______ waves
composite
sunlight is _________ light, consisting of many colors blended
Equal
the angle of incidence and the angle of reflection are____________
amplitude
the distance between the center line and the point farthest from the center line in a sine wave is called the_______
focal
the distance from the surface of a concave mirror to where a focused image is formed is called the _________ length
Speed of light in the medium
the index of reflection is found by dividing the speed of light in a vacuum
distance
the magnitude of an electromagnetic wave and the ____________ vary in an inverse-square relationship
Resonance
the natural vibration of an object to a range of frequencies of sound is called_________
virtual
the reflected image in a flat mirror is called _______ image
scattered
the sky appears blue because light from the sun is refracted and ______ in the atmosphere
Mechanical
waves that require a medium such as air, water, or another material are called _____________
Reinforcement
what is the effect on amplitude called in constructive interference?
reflected
when we see an object we see light that is _______ from it
