Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science 10 > Physics Unit Exam > Flashcards

Physics Unit Exam Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

what is sigdig short for?

A

significant digits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

do non-zero numbers count towards sigdigs?

A

YES!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

do leading zeros count towards sigdigs?

A

NO!!!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

do in-between zeros count towards sigdigs?

A

YES!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

do trailing zeros count towards sigdigs?

A

YES!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

how do you put something in scientific notation?

A

-move the decimal to after the first non-zero digit
-like usual, cut and round
-we need to account for the fact that we moved the decimal! to do this, add 10 to the exponent of how many times we moved the decimal.
ex. 12345678=1.23x10^7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

how many meters is in a kilometre?

A

1000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

how many millilitres is in a litre?

A

1000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is uniform motion?

A

moving at a constant rate in the same direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is average speed?

A

a change in distance over a given time interval
v=d/t

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what does the slope on a distance-time graph represent?

A

speed!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what does the steepness of a slope tell us?

A

how fast the object is moving

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what does the area on a speed-time graph represent?

A

distance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

how do we calculate slope?

A

x2-x1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is a scalar quantity and what is an example?

A

have a magnitude only; no direction associated with it.
ex. time, mass, distance, speed, energy, work

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is a vector quantity and what is an example?

A

have both magnitude and direction
ex. displacement, velocity, force, acceleration, deceleration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what is a position?

A

the separation between an object and its starting point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what does magnitude mean?

A

size/amount of/how many

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

is distance a scalar or a vector quantity?

A

SCALAR!

20
Q

is displacement a scalar or a vector quantity?

A

VECTOR!

21
Q

what is the navigator method?

A

ex. 30 degrees north of east

22
Q

what is the Cartesian method?

A

ex. 97 degrees north of east

23
Q

what is average velocity?

A

a change in position over a certain time
v=d/t

24
Q

what does the slope on a position-time graph represent?

A

velocity!

25
Q

what is acceleration?

A

the change in velocity during a given time interval
a=Vf-Vi/t

26
Q

what is acceleration measured in?

A

m/s^2

27
Q

what does the area on a velocity-time graph represent?

A

displacement

28
Q

what is a force?

A

a push or pull
mass x acceleration

29
Q

what is force measured in?

A

newtons(N)

30
Q

what is mass?

A

the amount of matter that makes up an object
measured in kg

31
Q

what is weight?

A

the force exerted on an object by gravity
measured in newtons(N)

32
Q

what does the area under a force-displacement graph represent?

A

work!

33
Q

what is Newton’s first law of motion?

A

in the absence of a net force, an object in motion will maintain its velocity, and an object at rest will stay at rest.

34
Q

what is the formula for work?

A

W=fd

35
Q

what is work?

A

transfer of energy from one object to another

36
Q

what is energy?

A

the ability to do work

37
Q

true or false: work is always equal to energy

A

TRUE!

38
Q

what are the three things that must happen for work to have been done?

A

1) the object must move some distance
2) a force must be applied
3) the direction of movement must be in the same direction as the applied force

39
Q

what are the 4 common types of kinetic energy?

A

electrical, thermal, light, and sound

40
Q

what are the 4 common types of potential energy?

A

chemical, elastic, nuclear, and gravitational

41
Q

what is the speed of gravity?

A

9.81 m/s^2

42
Q

what is mechanical energy?

A

the sum of an object’s energy
(kinetic+potential)

43
Q

what is the first law of thermodynamics?

A

energy cannot be created nor destroyed. only converted from one form to another

44
Q

what is the second law of thermodynamics?

A

no energy conversion is 100% efficient, some energy is always lost as heat when converting from one form to another.

45
Q

what is efficiency?

A

a measurement of how much energy input a machine converts into useful output energy

Science 10 (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions