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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