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75 Cards in this Set

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 velocity speed in a certain direction acceleration the rate of change of velocity volume a measure of how much space an object takes up mass a measure of how much matter is in an object gram the mass of one cubic centimeter of water at 4 degress celsius force push or pull Newton's 1st Law of Motion An object at rest remains at rest and an object in motion remains in motion at constant velocity unless acted upon by an unbalanced force Newton's 2nd Law of Motion F=ma Newton's 3rd Law of Motion for every action force there is an equal and opposite reaction force power the rate at which work is done energy the ability to do work kinetic energy energy due to an object's motion Law of Conservation of energy energy can neither be created nor destroyed by ordinary means wave a traveling disturbance that carries energy from one place to another transverse wave a wave in which the medium moves at right angles (perpendicular) to the direction of the wave atom a tiny particle made up of protons, neutrons, electrons and contains one nucleus atomic number the number of protons in an atom mass number the mass of an individual atom in AMU isotope atoms of an element with a specified number of neutrons valence shell the outermost shell of an atom refraction the bending of light as it travels from one medium to another half-life the amount of time it takes for half of the atoms of a substance to decay supernova when a star forms iron it collapses on itself and then explodes Big Bang theory About 13.7 billion years ago when a single point in the universe exploded, creating galaxies longitudinal wave a wave in which the medium moves back and forth in the direction of the wave How many milliliters are there in a liter? 1000 Will the mass of an object change if it is moved from Earth to the moon? no What are the two main measuring systems? English & Metric What does it mean when the acceleration of an object is negative? object is going backwards How many grams are there in a kilogram? 1000 What is the English unit of force? pounds What is the metric unit of force? Newtons How many Newtons are there in a pound? 4.5N All objects at rest have (----) forces acting upon them balanced All objects at constant velocity have (----) forces acting upon them balanced All accelerating objects have (----) forces acting upon them unbalanced What is the equation for calculating work? w=fd What unit is used to measure work in the metric system? Joules What unit is used to measure work in the English system? ft-lbs 1 hp = (----) ft-lbs/sec 550 What is the English unit of power? ft-lbs/second or HP What is the metric unit of power? Watts What does the word energy mean in Greek? work-within What unit is enrgy measured in? Joules What is the exception to the Law of Conversation of energy? nuclear energy What two measurements are needed to describe a transverse wave? amplitude & wavelength Which has more energy, a low amplitude wave or a high amplitude wave? high amplitude Which has more energy, a short wavelength wave or a long wavelength wave? short wavelength What causes sound? vibrations What is meant by one hertz? one per second Is a high pitch sound high frequency or low frequency? high frequency Is a high pitch sound long wavelength or short wavelength? short wavelength Approximately, what is the speed of sound in miles per hour? 750 mph Approximately how long does it take for sound to travel one mile? .000005 seconds What is the charge on a proton? +1 Where is the proton located? nucleus What is the charge on a neutron? neutral Where is the neutron located? nucleus What is the charge on an electron? -1 Where is the electron located? orbitals How much larger is a proton than an electron? 1836 times larger List the eight orbitals covered in class in the order that they fill? 1s 2s 2p 3s 3p 4s 3d 4p List the seven types of electromagnetic radiation from least energy to most energy radio/tv,microwave, infrared, visible, ultraviolet, x-rays, gamma List the seven colors of the visible spectrum from least energy to most energy red, orange, yellow, green, blue, violet What is the speed of light in miles per second? 186,000 What is the difference between AC and DC current? The direction in which the electrons flow What does frequency measure? sound What two particles can be added together to make the other particle? neutron & proton What is the value of g on Earth? g = 9.8m/s2 (acceleration due to gravity) If you double the mass of an object, what happens to the force due to gravity? doubles (----)centimeter(s) = 1 meter 100 (----)meter(s) = 1 kilometer 1000 (----)centimeter(s) = 1 inch 2.54 (----)mile(s) = 1 kilometer .62 A sparrow accelerates at 4 m/s2. This means that each second the sparrow's velocity changes by how much? 4 meters per second