Exploring Physics Final Review Flashcards
a = f/m
second law of motion
A feather and lump of lead will fall at the same speed in
vacuum
Acceleration is found by dividing the
change in speed by the change in time
adjusts light to the best focus.
lens
An object with a ___ charge has more protons than electrons.
positive
brings light to a focus.
cornea
carries information from the eye to the brain.
optic nerve
controls the amount of light that enters the eye.
iris
Density is equal to mass divided by
volume
developed a model of the atom and electron orbits
Niels Bohr
developed the uncertainty principle
Werner Heisenberg
Doubling mass of a moving object ___ its kinetic energy.
doubles
Doubling velocity of a moving object makes its kinetic energy
four times as great
explained black body radiation by using energy quanta
Max Planck
f = m x a
force equation
fab = -fba
third law of motion
Heat is a type of
energy
Heat is the motion of ___
atoms and molecules
How can scientist measure temperatures higher than 1,700o?
They can measure higher temperatures with electrical conductivity and color of light emitted by glowing substance.
I = f x t
definition of impulse
Inertia is a property of matter that resists changing its
velocity
is a surface of light sensitive nerves.
retina
is sensitive to light and can distinguish color.
cones
is sensitive to light but cannot see color.
rods
is the opening through which light enters the eye.
pupil
James Prescott Joule found how mechanical energy due to motion compares to ___ energy.
heat
Label the four forces acting on an airplane in flight.
Momentum is the mass of an object times its
velocity
If f = 0 then a = 0
first law of motion
p = m x v
definition of momentum
Physics is the science that explores how energy acts on
matter
Pressure times volume of any gas divided by the temperature is a constant.
Ideal gas law
proposed matter waves and calculated their wavelengths
Louis de Borglie
Rank theses waves in order from lowest frequency (longest wavelength) to highest frequency (shortest wavelength):
blue visible light
AM radio raves
X rays
infrared light
AM radio waves
infrared light
blue visible light
X rays
State Ohm’s law
current = voltage/resistance, or in words: current is directly proportional to voltage and inversely proportional to resistance.
State the second law of motion
The acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass.
State the third law of motion
to every action there is an equal and opposite reaction.
Thales of Melitus discovered that ___ could be given a charge of static electricity.
amber
The first person to state that uranium could undergo fission and produce a self-sustaining chain reaction
Lise Meiter
The first scientist to generate electromagnetic waves was
Rudolf Hertz
The force that pushes electrons around a circuit is
voltage
The frequency of a sound is known as its
pitch
The Heisenberg uncertainty principle states that the precise position, mass, and ___ cannot be determined exactly.
velocity
The lifting force acting on a solid object immersed in water is equal to the weight of the water shoved aside by the object.
Archimedes’ principle of buoyancy
The loudness of sound is measured in
decibels
The purpose of a moderator is to
slow neutrons
The scientist who developed four equations that summarized electromagnetism was
James Clerk Maxwell
The scientist who discovered that pure water has a fixed boiling and freezing temperature was
Daniel Fahrenheit
The study of sound is known as
acoustics
The three factors that determine the heat contained in an object are type of substance, mass, and
temperature
The three properties of a sound are frequency, intensity, and ___.
quality
The two most common substances used in thermometers are colored alcohol and
mercury
The velocity of a fluid and its pressure are inversely related.
Bernoulli’s principle
The volume of a gas is inversely proportional to the pressure.
Boyle’s law
To calculate speed, divide distance by
1time
To reduce the heating effect of electricity in wires, the current is reduced but the ___ is increased.
voltage
