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Science 10 > Physics Unit Final > Flashcards

Physics Unit Final Flashcards

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1
Q

what do you do if a question comes in scientific notation

A

answer in scientific notation

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2
Q

what two types of graphs can be used for uniform motion

A

distance-time graph and speed-time graph

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3
Q

what is the line of best fit on a distance time graph showing unirfomr motion

A

a stright line with a positive slope

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4
Q

what does the slope of a distance-time graph fepresent

A

the speed of an object

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5
Q

what does the line of best fit in a speed-time graph depicting uniform motion look like

A

a horizontal straight line

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6
Q

what does the line of best fit on a speed-time graph indicate when the object is travelling in uniform motion

A

that as time increasees the speed of the object remains constant

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7
Q

what does a slope of 0 meanm in a distance time graph

A

there is no motion

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8
Q

how do you determine the distance travelled by the object in a speed-time graph

A

calculate the area under the line of the graph

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9
Q

what two types of graphs can be used to analyze average velocity

A

position-time graph, velocity-time graph

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10
Q

when do you not need to indicate direction when solving for a vector quantity

A

if you are just aksed for a magnitude

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11
Q

what is the simplest type of motion

A

uniform motion

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12
Q

what is the most common type of motion

A

acceleration

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13
Q

what is the line of best fit look like in a position-time graph showing acceleration

A

a smooth curve

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14
Q

what is the typical pattern of motion for an object

A

an ‘s’ like curve

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15
Q

what does the slope of a velocity-time graph indicate

A

rate of acceleration

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16
Q

what does the line of best fit look like in a velocity-time graph for an object in accelerated motion

A

a straight line with an increasing or decreasing slope

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17
Q

what happens if all the forces on an object are balanced

A

the object doesn’t move

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18
Q

what does everything at rest have acting on it

A

balanced forces

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19
Q

what is force

A

a push or pull on an object

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20
Q

when will an object move

A

when an unbalanced force is applied to it over a given distance

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21
Q

what happens to an object in uniform motion if forces are applied

A

it will go through acceleration and either increase or decrease in velocity

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22
Q

when do all objects tend to remain in uniform motion or stay at rest

A

in the absence of any external unbalance forces

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23
Q

what happens if there is no force acting on an already moving object

A

it will keep moving

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24
Q

what happens when something does work on an object

A

energy is transferred to that object

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25
Q

what are the three conditions for work to occur

A

there must be movement, there must be application of force, the force and distance the object travels must be in the same direction

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26
Q

are energy and work the same thing

A

yes

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27
Q

what happens when a body does work on an object

A

the body doing the work loses energy and the object that has work done to it gains energy

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28
Q

whats chemical energy

A

potential energy stored in the chemical bonds of compounds that is released when bonds are broken

29
Q

what is occurring during an energy transfer between objects

A

one object is doing work on the other object

30
Q

what is electircal energry

A

work done by moving charges in the form of flowing electrons in currents

31
Q

what is nuclear energy

A

potential energy stored in the nucleas of an atom that is released when the atom is split or when two nuclei of atoms combine

32
Q

what is solar energy

A

energy that results from a ydorgen-hydrogen nulcear fusion reaction with the release of nuclear energy that can be converted into other energy forms

33
Q

whats nuclear fission

A

the splitting of the nucleous of an atom

34
Q

what is nuclear fusion

A

when the nuclei of two atoms combine

35
Q

what two types of energy can be observed in nature

A

kinetic energy and gravitational potential energy

36
Q

what is earths acceleration due to gravity

A

9.81 m/s2

37
Q

if you are given two heights in a word problem, which one should you use

A

the vertical one, or the one that is straight up

38
Q

when plotting a speed-time or velocity-time graph how should you connect the dots

A

using a line of best fit

39
Q

what happens to an object if it’s falling

A

all of its potential energy from the top will be converted to kinetic energy

40
Q

what can you use the pendulum theory for

A

to find the speed of an object at the bottom of its course right before it hits the ground

41
Q

what word often indicates the input of energy

A

consumes

42
Q

what word often indicates the output of energy

A

work

43
Q

when is potential energy useful

A

when it is converted into some other form of energy

44
Q

what is the law of conservation of energy state

A

energy cannot be created or destroeyed. it can only be transformed from one form to another, and the total amount of energy never changes

45
Q

what has to happen in order for the law of conservation of energy to work

A

the energy lost by one system has to be gained by the other

46
Q

how does a pendulum work

A

at the top it has full gravitational potential energy and as it swings down in an arc that energy begins to convert to kinetic energy till the pendulum gets to the bottom of the arc at its maximum speed and is converted fully into all kinetic energy

47
Q

what do you need to look for when solving a pendulum problem

A

a vertical height

48
Q

what are the three things that show that an energy conversion has occurred

A

change in shape, change in temperature, motion

49
Q

whats a system

A

the object or objects involved in the energy transfers

50
Q

whats an open system

A

system that exchanges both matter and energy with its surroundings

51
Q

whats a close system

A

one that cannot exchange matter but can exchange energy with its surroundings

52
Q

whats an isolated system

A

one that cannot exchange either matter or energy within its surroundings

53
Q

what is the difference between heat and work

A

work involves the movement of matter from one location to another whereas heat is a transfer of thermal energy from one location to another

54
Q

what are the two ways the energy of a system can be increased

A

heat can be added or work can be done on the system

55
Q

what is the first law of thermodynamics

A

the total energy, including heat, in a system and its surroundings, remains constant. whenever heat is added to a system, it transforms into an equal amount of some other form of energy.

56
Q

what would happen if no energy is converted to other forms

A

the machine would operate indefinitely

57
Q

is it possible to create a perfect machine

A

no

58
Q

what is the second law of thermodynamics

A

heat always flows naturally from a hot object to a cold object, but never natural flows from a cold object to a hot object

59
Q

whats energy input

A

the initail energy source

60
Q

whats useful energy output

A

the desired energy needed to do the work

61
Q

whats useful work output

A

the work the machine is supposed to do

62
Q

whats a solar energy source

A

those that are derived either directly or indirectly from the energy of the sun

63
Q

whats a non-solar energy source

A

sources that have no relationship to the sun

64
Q

what are renewable energy sources

A

ones that are continually and infinitely available or can be replaced in a reasonable length of time

65
Q

whats a non-renewable energy source

A

sources that are limited and irreplaceable

66
Q

what does a position-time graph measure

A

displacement

67
Q

what does a velocity-time graph measure

A

distance

68
Q

what does it mean if there is no displacement

A

no motion

69
Q

what does a negative velocity mean

A

you are going that speed in. different direction

Science 10 (13 decks)

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