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61 Cards in this Set
- Front
- Back
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What will happen if the net force on an object is zero?
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The Object has balanced forces
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If an object is standing still what are the values that are always zero?
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speed, velocity, and momentum
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Why does an apple look red?
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The apple reflects red light and absorbs other colors.
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How do you calculate acceleration?
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change in velocity divided by time
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What is the pitch of a sound most closely related to?
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the frequency of vibrations
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What is momentum divided by velocity?
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the object's mass
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Which type of electromagnetic waves has the highest frequency?
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gamma rays
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What is a lens that can focus light?
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convex lens
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What is the transfer of energy by the movement of fluids or gases with different temperatures?
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convection
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What effect does resonance refer to?
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vibration of one object causes another object to vibrate at natural frequencies
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What is the law that states that every object maintains constant velocity unless acted on by an unbalanced force?
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Newton's first law of motion
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How long can nuclear power plants in the US be operated for under current regulations?
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40 years
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What is measured with thermometers, proportional to the average kinetic energy of molecules, and associated with the sensation of hot and cold?
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temperature
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How is power measured?
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watts
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What is the method of energy transfer which does not involve movement of matter?
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radiation
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Which transfer of energy involves direct contact?
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conduction
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What is the opposite reaction to fusion?
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fission
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What is the law that states that for every action force there is an equal and opposite reaction force?
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Newton's third law of motion
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What is the transfer of energy as heat caused by the collision of molecules?
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conduction
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What type of substance is the best conductor of transferring energy as heat?
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a metal
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What happens to the nuclei during fusion?
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combine or join
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What type of force is happening when a tug-of=war results in one team pulling the other across the line?
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unbalanced forces
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What is the type of nuclear radiation that can penetrate the farthest through matter?
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neutron emission
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What is the SI unit for acceleration?
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m/s2
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What does gravity depend on?
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weight and distance
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What is the top of the wave?
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crest
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What does gravitational potential energy depend on?
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acceleration due to gravity, the mass of the object, and the height of the object
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What is used to calculate momentum?
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mass, speed, direction
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What temperature does water freeze at using the Kelvin Temperature scale?
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273K
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What is the law that states that the unbalanced force acting on an object equals the object's mass times its acceleration is what?
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Newton's second law of motion
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What changes the velocity of an object?
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a force
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What is the effect in which white light separates into different colors?
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dispersion
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What does Absolute Zero mean?
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all atoms stop moving
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Why do convection currents rise in air
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cool air descends and hot air rises
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What nuclei are Alpha particles from?
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helium
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What happens to the force of gravity when objects move further apart from each other?
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gravity decreases
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What is the downward force exerted on objects due to gravity?
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weight
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What type of electromagnetic radiation is used to kill cancer cells?
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gamma rays
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What is the speed of an object at rest?
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0 km/h
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A line with a negative slope on a velocity-time graph, will indicate what is happening to the object?
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slowing down
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What are types of nuclear radiation?
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alpha particles, beta particles, neutrons emission
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What does momentum have?
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velocity and mass
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What happens as the kinetic energy of the molecules in a substance increases?
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temperature of the substance increases
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What is the difference between speed and velocity?
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Velocity includes direction
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What are the Fahrenheit scale defined as?
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Water boils at 212 and freezes at 0 degrees
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What waves are used for cooking and communication?
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microwaves
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What is the primary source of the sun's energy?
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nuclear fusion
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What is unstable in radioactive materials?
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nuclei
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What does kinetic energy depend on?
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mass and velcocity
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Where does sound travel the fastest?
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sea water
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What wave has the highest frequency?
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gamma ray
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What is the unit for power?
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Joule
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What wave has the lowest frequency?
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radio wave
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What uses ROY G BiV for the colors for this wave?
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visible light
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What are the units for momentum?
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kg x m/s
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What lens cannot focus light and is for nearsightedness?
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concave lens
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Will the temperature of a volume of gas change if the pressure of the gas or volume of the gas changes?
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yes
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Does energy transfer heat between two objects at the same temperature?
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no
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Do machines decrease the amount of energy that is needed to do work?
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no
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What is the only method of energy transfer that can take place in a vacuum
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radiation
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Does it take more energy as heat to raise the temperature of water by one degree than to raise the temperature of steam by the same amount?
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Yes
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