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### 61 Cards in this Set

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