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Physics Final Exam Study Guide (sorry for spelling errors) (can edit)
Terms in this set (42)
an apparent outward force on rotating or revolving body
the force directed toward a fixed center that causes an object to follow a circular path
(angular speed) the number of rotations per unit of time
the product of the force on an object and the distance through which the object is moved
What are the units of work?
the rate at which work is done
what are the units of power?
joule per second (watt)
energy that is stored or held in readiness
What equations can be used to describe potential energy?
PE = mgh (mass
Gravitational PE = weight * height
energy of motion
What equations can be used to describe kinetic energy?
KE = 1/2 mv ^2 (half the object's mass * by the square of its speed)
fd = 1/2 mv^2 (the net force on an object * the distance along which the force acts equals the objects kinetic energy)
the transfer of energy within materials and between different materials that are in direct contact
heat transfer by movement of the heated substance itself
energy transmitted by electromagnetic waves
the physical bottom of the pot getting heated by the stove (direct contact)
water in a pot getting heated on a stove
energy from the sun reaching earth
What are good absorbors?
What are good emitters?
What are good reflectors?
light colored or shiny; are poor absorbers of radiant energy (reflective toaster)
the warming of a planet's surface due to the trapping of radiation by the planet's atmonphere
(inertia in motion) mass of an object multiplied by its velocity
What is change in momentum? (???)
depends on the force that acts and the length of time it acts
What is newton's third law?
For every action, there is an equal and opposite reaction.
when objects collide without being permanently deformed and without generating heat
a collision in which colliding objects become destorted and generate heat during the collision
What is the freezing and boiling point of water on the Fahrenheit scale?
freezing = 32
boiling = 212
What is the freezing and boiling point of water on the Celcius scale?
freezing = 0
boiling = 100
What is the freezing and boiling point of water on the Kelvin scale? (??????????)
(number 0 is absolute zero which is -273 degrees Celsius)
Why doesn't the temperature of the ocean change very much?
the cold air over the ocean is blown onto the land and keeps the coastal cities and a cool constant temp year round/Water takes longer to heat to a certain temperature than most substances, and it takes longer to cool.
What happens to the hole in an iron ring when you heat it up?
Why don't lakes freeze all the way to the bottom in the winter? (??????)
they are too deep;
What is the source of all wave motion?
the number of vibrations an object makes in a unit of time
the distance from the midpoint to the crest (or trough)
the distance from the top of one crest to the top of the next one
the time of a back-and-forth swing of a pendulum
a wave that appears to stay in one place- it does not move through the medium
example transverse waves
waves in strings on instruments; radio waves; light waves (whenever the motion of the medium is at right angles to the direction in which a wave travels)
example longitudinal waves
sound waves (when the particles in the medium is at right angles to the direction in which a wave travels)
the apparent change in frequency due to the motion of the source
How is the energy in a piece of food determined?
by burning the food (calories)
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