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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