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| the image formed by a plane mirror is |
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| the production of a spark is an example of |
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| the unit used to measure frequency is the |
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| what isn't true about a real image? |
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| it appears behind the mirror |
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| electromagnetic induction is the process of producing an electric current by moving a loop of wire |
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| when a firecracker explodes mass is... |
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| when 2 or more substances are combined so each substance can be separated by physical means, the result is a |
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| 3 examples of a physical change are |
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| boiling of water, bursting of a balloon, crumplinga piece of paper |
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| according to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants? |
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| according to the law of conservation of mass, if 2 atoms of hydrogen are used asa reactant, how many atoms of hydrogen must be part of the produt? |
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| a certain atom has 26 protons, 26 electrons and 30 neutrons. it's mass number is |
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| what is the formula for this compound...copper(I) sulfide |
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| what is the name for the following compound? ...CaBr2 |
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| one isotope of uranium is u-238 how many protons and neutrons does it have? |
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| throuh which of the following will convection most likely occur/ |
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| unit used to measure heat is |
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| one benefit of the SI system is that it is |
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| based on multiples of ten |
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| if a fgraph is decelerating, what would the line look like? |
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| the relationship among mass, force and acceleration is explained by |
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| newton's second law of motion |
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| 3 m/s north is an example of |
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| inerti varies depending on |
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| the path of a projectile is |
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| how many meters are there in 1, 865 |
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| what is necessary for an object to accelerate |
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| 2 cars are traveling along the same road at the ame speed but at differet velocities. explain. |
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| cars are traveling in different directions |
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| a 10-kg wagon has a speed of 25 m/s what is it's momentum? |
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| p=mv...10 x 25 momentum= 250 kgm/s |
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| find the acceleration of a car that goes from 32 m/s to 96 m/s in 8 s. |
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| a cross country runner runs 10 km in 40 mins. average speed? |
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| solid in double replacement lab |
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| speed of sound is faster in ___ than gas |
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| frequency increases, so does the... |
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| compared o gamma rays, x rays have... |
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| longer waves, and less frequency |
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| light rays bend ___ from normal |
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| ____ is the opposition to flow of electrons |
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| compass needle pts. parallel to ___ |
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| voltage=12v current=3 amps resistance=?? |
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| velocity increase on graph |
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| right/wrong, why? and refer 2 hypothesis |
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| dpendednt = ? independent = ? |
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| once liquid starts boiling the temp ______ |
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| mass of proton or neutron |
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| 2 elements combine to make coumpuound. |
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| exothermic, reaction released heat |
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| what is the charge that has more protons than electrons? |
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| parallel circuit, if vt = 1.5 and resistance in 1 resistor = .5 ohms what is the total current? |
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| refers to the ratio of mass per unit volume |
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| change in position. is relative |
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| distance an object ravels per unit of time |
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| speed equals distance over time |
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| speed in a particular direction |
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| final time - initial time over change in time |
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| change in velocity over a given time period |
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| acceleration= velocity/time |
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| unevenness of surfaces, contact between 2 surfaces |
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static: no motion b/w 2 sufraces
sliding: motion bw surfaces
rolling: type of static |
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| terminal velocity: all objects ___ as they fall |
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| centripal force is the net force exetered toward the center of a ____ |
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| force needed to change an object's mootion |
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| sound needs a ___ in which to travel |
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| pitch is the human ear version of... |
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| intensity of a sound wave ____ as the wave spreads out from the source of the sound |
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| electromagnetic radiation or light. |
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| desn't need matter to ransfer enery |
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| regular light, no distortion |
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| refraction of light is the change in _____ from one meduim to another |
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| incoming parallelilht rays all reflect through the same poin t in front of the mirror. outgoing rays are parallel too |
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| light diverges after hitting a convex mirror. everything appears smaller |
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| an image appears to be real, but isn't |
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| nearsightedness, image forms +++++ of retina |
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image forms behind retina
convex lens to correct |
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| insulators ____ conduct easily |
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| conductors ++++++ electrons to move freely |
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| potential difference (volts) |
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| difference in charge. the greater the potential diff. the fcaster charge will flow |
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| potential diff. in homes is |
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| there must be a +++++ for electric charge to flow |
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| shows the relationship between potential difference, current and resitance |
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| series circuits have all parts of the circuite connected _____________ |
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| parallel circutis have different paths of the circuit on different brances |
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| less lights go outt if a segment breaks |
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| magnets all have a notth and south ple |
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| norht + norht repel. n+s attract |
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| matter is composed of partiles |
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| (atoms, molecules or ions) |
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| temperature is a measure of the |
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| average kinetic engery of the particles |
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| teh ++++++++ the specific is, the easier it is for the substance to not onl gain heat but to lose it too |
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| heat transferred = mass x (final temp -initaltemp ) x specific heat |
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