1st Semster Test Flashcards
The prefix kilo means
1000
What involves the study of matter and it’s motion through space ad time
Physics
The correct symbol for the SI unit of temperature is
K
The SI unit that is used to measure time is the
Second
The variable plotted in the horizontal or x- axis is called the
Independent variable
How many meters are there in 1,865 cm
18.65
The best type if graph to use to show how some fixed quantity is broken down into parts is
Circle graph
A beaker contains 0.32 L of water. What is the volume of this water in milliliters
600
Another term for technology is
Applied science
The process of gathering information through the senses is called
Observation
When designing and experiment, the first step is to
State the problem
A factor that is manipulated in an experiment to change the dependent variable is the
Independent variable
A rule or principle that describes what happens in nature is a
Scientific law
What is a system of knowledge and the Mathias used to find that knowledge
Science
An explanation if an event that is based on repeated observations and experiments is a
Theory
What are the building blocks of all matter
Atoms
An idea, event, or object can be represented by. To help people better understand it
Model
A standard for comparison that helps to ensure that the experimental result is caused by the condition being
Control
A factor in an experiment that changes from the manipulation of the independent variable is the
Dependent variable
A factor that does NOT change in an experiment is the
Constant
Studying the effect if one thing on another in order to yet a hypothesis is an
Experiment
Motion is a change in
Position
3m/s north is an example of
Velocity
A merry go round horse moves at a constant speed but at a changing
Velocity
Acceleration is rate of change of
Velocity
A horizontal line on a velocity/ time graph shows
Same speed
Inertia varies depending on
Mass
Newton’s first law of motion is also called the law of
Inertia
What is the speed of a bobsled whose distance time graph indicators that it traveled 100 m in 25 s
4 m/s
Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 1s. What is your acceleration?
2 m/s
The upward force on an other falling through the air is
Air resistance
The relationship among mass, force, and acceleration is explained by
Newton’s second law of motion
A feather will fall through that air more slowly than a brick because of
Air resistance
The acceleration due to gravity is
9.8 m/s
According to Newton’s second law of motion
F=mxa
When an object moves in a circular path, it accelerates toward the center of the circle as a result of
Centripetal force
The path of a projectile is
Curved
For an object, the greater the force that’s applied to it, the grater its ___ will be
Acceleration
The size of the gravitational force between two objects depends on their
Masses and distance between them
When a force is exerted on a box, an equal and opposite force is exerted by the box. These forces are called _____ forces
Action-reaction
The statement “to every action there is an equal and opposite reaction” is
Newton’s third law of motion
A 300 N force acts on a 25 kg object. The acceleration of the object is
12 m/s 2
The SI unit of force is the
Newton
When an unbalanced force acts on an object
The objects accelerates
What is the momentum of a 50 kilogram ice skater gliding across the ice at a speed of 5m/s
250 kg•m/s
The rate at which work is done is called
Power
The unit of power is the
Watt
If you exert a force of 10.0 N to lift a box a distance of .09 m, how much do you do
9.0 J
The kinetic energy of an object increase as its ____ increases
Velocity
The SI unit for energy is the
Joule
A bus engine transfers chemical potential energy into _____ so that the bus moves
Kinetic energy
In a nuclear fusion reaction mass is transformed into
Energy
According to the law of conservation of energy the total amount of energy in the universe
Is never created or destroyed but changes forms
A material that reduces the flow of heat by conduction convection and radiation
An insulated
The transfers of energy that does not require matter is
Radiation
Energy from the sun travels to earth as
Radiant energy
The process by which engine fuels burn is called
Combustion
A device that converts thermal energy into mechanical energy is a
Heat engine
The energy of motion is called
Kinetic energy
A small 20 kilogram canoe is floating downriver at a speed of 2 m/s what is the canoes kinetic energy
It’s speed
A 4 kilogram cat is resting on top of a bookshelf that is 3 meters high. What is the cats gravitational potential energy relative to the floor if the acceleration due to gravity is 9.8 m/s 2
118 J
Which of the following increases when an object becomes warmer
Thermal energy
The energy stored in gasoline is
Chemical energy
The mechanical energy of an object equals it’s
Kinetic energy plus it’s potential energy
Fossil fuels currently account for the majority of the worlds energy use because they are
Relatively inexpensive and readily available
Heat is the transfer of thermal energy from one object to another because of a difference in
Temperature
What property of an object is related to the average kinetic energy of the particles in that object
Temperature
In the formula Q=mxcxtriangleT which quantity represents the specific heat
C
Matter that has a definite volume and a definite shape is a
Solid
Matter that has a definite volume but no definite shape is a
Liquid
Most matter ____ when heated
Expands
The theoretical point at which all molecular motion stops is called
Absolute zero
What is the SI unit of pressure
The pascal
Which of the following states bernoulli’s principle
As the speed if a fluid increases the pressure within the fluid decreases
According to _____ the buoyant force on an object in a fluid is equal to the weight if the fluid displaces by the object
Archimedes principle
According to ____ as the velocity of a fluid increases the pressure exerted by the fluid decreases
Bernoulli’s principle
According to ______ pressure applies to a fluid is transmitted unchanged throughout that fluid
Pascal principle
The upward force acting on an object submerged in a fluid is called
Buoyant force
The most common state of matter in the universe is
Plasma
A fluid’s resistance to flow is called
Viscosity
When you squeeze together the coils of a spring and then release them you are creating a ___ wave
Compressional
You are creating a wave on a spring if you start shaking the spring more slowly the wave length of the resulting wave will
Increases
The energy a wave carries is measured by its
Amplitude
You can see this paper your desk and the person in front of you because light is being
Reflected
When a wave passes from a less dense medium to a more dense medium the _____ may change
Speed
When the crest of one wave passes through the trough of another wave _____ take place
Destructive interference
Sound travels in a ____ waver
Compressional
The speed of sound in _____ is greater than the speed of sound in water
Loudness
The unit uses to measure frequency is the
Hertz
For the Doppler effect to occur ____
Either source or listener must be moving
Reverberation in concert halls is caused by ____ of sound
Reflections
A system of using the reflection of underwear sound waves is
Sonar
Electromagnetic waves
Are transverse waves
The _____ is the particle that carries radiant energy
Photon
Electromagnetic radiation with the shortest wavelengths is
Gamma rays
The frequency of purple light is _____ that if yellow light
Higher than
_____ are used for medical imaging
X rays
Gamma rays are dangerous because they
Break down molecules and cells
AM wave frequencies are _____ FM frequencies
Lower than
FM. Frequencies are in the range of
Radio waves
Television uses _____ to transmit signals
Radio waves
What wavelength of light is reflected from a red shirt
Red
The primary pigment colors are
Magenta cyan and yellow
The color _____ is produced by blending the three primary pigments
Black
If light waves change speed when they pass from one medium into another the light will be
Refracted
The primary light colors are
Red blue green
The color _____ is produced by blending the three primary colors of ligh
White
Any smooth surface that reflects light to form an image is a
Mirror
The bowl of a shiny spoon forms an enlarged upright image similar to that of a _____ mirror
Concave
_____ are thick in the middle and thin at the edges
Convex lenses
The image formed by a plane mirror is
Upright and reverses
Light is refracted and spread out by a
Concave lens
Resistance is measured in a unit called
Ohm
The statement that current is equal to the voltage difference divided by the resistance is known as
Ohm’s law
A path that allows only one route for an electric current is called
Series circuit
Electric charge that had accumulated on an object is referred to as
Static electricity
A material through which electrons do not easily flow is an
Insulator
Lightning is
A large discharge of static electricity
One source of constant electric current is a
Dry cell battery
Which of the following is a designed to open an overload circuit and prevent overheating
Circuit breaker
A device that increases or decreased voltage in a power line is a
Transformer
Current that does not reverse direction is called
Direct current
Current that reverses direction Ina regular pattern is called
Alternating current
What creates magnetic field
Moving electric charges
Which if the following particles is smaller than rest
Electron
I what star must matter exist for fusion reactions to take place
Electron
In what state must matter exist for fusion reaction to take place
Plasma
What is the resistance of a circuit that has a voltage of 90 and a current of 9 amps
10 ohms
What is the current of a circuit is the voltage is 120 volts and the resistance is 4 ohms
30 amps
