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84 Cards in this Set

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Displacement is best defined as..
the change in distance over time
velocity is best defined as...
the rate of change of displacement
acceleration is best defined as
the rate of change of velocity
translation is best defined as
motion without rotation
the center of mass is best defined as
the point where all the mass in a body can be concentrated
the principle of inertia is best explained by
constant motion does not require a force
scalar is to vector as::
speed is to velocity
the approximate number of seconds in a year is
10^8
a rate is best defined as
a comparison to time
if you double the height of a person, then
surface area doubles, bone strength doubles, weight doubles
the solar wind is best defined as
a stream of charged particles emitted from the sun
plasma is best defined as
the answer said none of these, so go find out
the cause of a magnetic field is best explained by
the movement of electric charges
the process that powers the sun is
fusion
the chemical composition of a star can be determined by
spectroscopy
the temperature of the surface of a star can be determined by its
color
terrestrial is to gas giant as ::
mars is to neptune
planetary day is to planetary year as ::
rotation is to revolution
albedo is best defined as
the percentage of light reflected from a planet
asteroid is to comet as ::
rock is to ice
all of the following are necessary to create an aurora except (a magnetic field, the solar wind, ionized gas, sunlight, none of these)
sunlight
the best explanation for why a comet becomes visible as it approaches the sun is (it is large and shiny, ice vaporizes to gas which is set on fire by the solar wind, ice vaporizes to gas which is ionized by the solar wind, it gets hot and the hydrogen starts to burn in the air in space, it gets hot and the hydrogen starts to fuse because of the sun's gravity)
ice vaporizes to gas which is ionized by the solar wind
the planet that owuld float in water is..
saturn
the hottest planet is
venus
the surfaces of cloud-covered planets and moons have been mapped by using
microwave light
nucleosynthesis is best explained as
the production of heavier elements from lighter ones
plasma is best defined in physics as
a mixture of atomic nuclei and electrons that are not bound to each other, radio-active matter, and a high temperature ionized gas
the way a star achieves hydrostatic equilibrium is best explained by
the forces of gravity and fusion being balanced
the process that powers the stars is
fusion
the chemical composition of a star can be determined by
spectroscopy
the temperature of the core of a star can be determined by (the mass of the star, the color of the star, or the age of the star)
The color of the star
white dwarf is to small star as ::
red dwarf is to white dwarf (but i don't know if this is right or not...?)
planetary nebula is to small star as ::
super nova is to large star
isotopes are best defined as
elements with the same atomic number but different numbers of neutrons
hydrogen is to helium as ::
helium is to carbon
all of the following are conducive to life existing in a star system except: (a chemically enriched planetary environment, a stable energy output from the star, a planet with a medium mass, a star that emits primarily microwave EM radiation, none of these)
a planet with a medium mass
the best explanation for why the core of a star collapses is
the fusion reactions in the core stop and gravity compresses it
the star with the hottest surface is what spectral type?
O
the reaction that requires the hottest temperature is (hydrogen to helium, helium to carbon, carbon to iron, carbon to uranium, unable to determine without more info.)
carbon to uranium
if the surgace temperature of a star doubles, the energy output of the star
increases by a factor of 16
barycenter is best defined as
the center of mass of a multiple star system
the 2 factors that determine the luminosity of a star are
color and mass
when an electron in an atom jumps from a higher energy level to a lower one, the atom
emits light
the best example of an ideal blackbody is
a cavity
displacement is best defined as
the change in distance over time
velocity is best defined as
the rate of change of displacement
acceleration is best defined as
the rate of change of velocity
a projectile is best defined as
a body that is freely-falling
all of the following are projectiles except (a ball thrown upward, a bullet fired downward, an arrow fired horizontally, the moon, a jet plane)
a jet plane
the principle of inertia is best explained by
constant motion does not require a force
scalar is to vector as ::
time is to force
vectors are added tip to tail; the resultant is drawn
tail-to-tail with the first vector
a vector can always be written as the sum of the two
perpendicular components
the best explanation for why a ball shot horizontally with a large speed will take the same time to fall as a ball released from rest at the same height is
gravity has no horizontal effects
potential energy is best defined as
energy due to position or configuration in realation to a force
heat is best defined as
energy transferred by conduction due to differences in temperature
temperature is best defined as
a measure of kinetic energy
work is best defined as
the vector dot product of a force and a desplacemnt
all of the following are examples of positive work except (the work done by you while lifitng a book to a height of 1 meter, pushing a desk across the floor, compressing a spring, accelerating a baseball from rest to 90 mph, lowering a book a height of 1 meter)
the work done by you while lowering a book a height of 1 meter
the principle of conservation is best explained by
the total amount remains conctant in a closed system
scalar is to vector as ::
work is to force
two vectors are perpendicular if
the dot product of the two vectors is zero
a force does no work if
the force is perpendicular to the displacement
all of the following incolve negative potential energy excpe t(the energy of a proton in a the atomic nucleus, of an electron in an atom, of a person standing on the earth, of two magnets that are attracting eachother, of two magnets that are repelling each other
the energy of two magnets that are attracting each other
linear momentum is best defined as
the intensity of translational motion
impulse is best defined as
force times time
center of mass is best defined as
the point where all the mass can be imagined to be concentrated
the velocity of the center of mass remains constant in all of the following except (the net force acting on the sustem is zero, the net impulse on the sustem is zero, the acceleration of the system is constant, the net force acting on the system is constant)
the net force acting on the system is constant
all of the following must occur due to an impulse acting on a rigid body excpept (the momentum of the body changes, the kinetic evergy of the body changes, the velocity of the body changes, the potential energy of the body changes, none of these)
none of these
all of the following are logical consequences of the conservation of momentum except (the velocity of the center of mass of two colliding carts remains constant, the acceleration of the center of mass of two colliding carts remains constant, newton's first law, newton's second law, newton's third law)
the acceleration of the center of mass of two colliding carts remains constant
scalar is to vector as ::
work is to impulse
when a cart collides elasticallyw ith a spring, all of the following occur except (the momentum of the cart is conserved, the kinetic energy of the cart is transformed into potential energy in the spring, an impulase is applied to the cart by the spring, an impulse is applied to the spring by the cart, the cart rebounds with the same speed that it hit the spring)
the cart rebounds with the same speed that it hit the spring
the defining characteristic of an elastic collision is
the kinetic energy of the system is conserved
which of the following conditions for an inelastic collision between a fast moving projectile and a stationary target will result in the maximum transtormation of kinetic energy? (The projectile and the target have the same mass, the projectile is much more massive then the target, the projectile is much less massive than the target, it doesn't matter; all of the energy is transformed, none of these)
the projectile is much more massive then the target
center of gravity is best defined as
the point where all the weight can be imagined to be concentrated
center of pressure is best defined as
the point where all the aerodynamic forces can be imagined to be concentrated
a model rocket is stable when
the center of pressure is behind the center of gravity
the engine code F 50-6 means:
the impulse is F class, the average thrust is 50 N and there is a 6 s delay
a fin fillet is
glue added to the fin- body seam to increase strength
all of the following are necessary to make a sage launch except (the thrust to lift off weight ratio is 5 to 1, the engine uses an elevtrical ignition system, an altimeter for dual deployment, a parachute or other recovery mechanism, a well- constructed model that has no structural damage)
an altimeter for dual deployment
the third law interaction that explains how a rocket is propelled is
the rocket motor pushes on the fuel and the fuel pushes on the rocket motor
the engine core geometry that will give the greatest lift off thrust is
the star core
the main purpose of the launch lug is to
allow the rocket to slide along the launch rod until it is moving fast enough for stable flight
which of the following choices of engine and parachute will allow you to have the greatest chance of recovering your very small light rocket safely and undamaged on a breezy day? (a small engine and no recovery device, a small engine and a small parachute, a large engine and a small parachute, a large engine and a large parachute, a huge engine and a huge parachute)
a small engine and a small parachute