Topic 1 Flashcards
1
Q
What is the base unit for length?
A
meter
2
Q
What is the symbol for meter?
A
m
3
Q
What is the base quantity of a meter?
A
length
4
Q
What is the base unit for mass?
A
kilogram
5
Q
What is the symbol for a kilogram?
A
kg
6
Q
What is the base quantity for a kilogram?
A
mass
7
Q
What is the base unit for time?
A
second
8
Q
What is the symbol for a second?
A
s
9
Q
What is the base quantity for a second?
A
time
10
Q
What is the base unit for a current?
A
ampere
11
Q
What is the symbol for an ampere?
A
A
12
Q
What is the base quantity for an ampere?
A
current
13
Q
What is the base unit for temperature?
A
Kelvin
14
Q
What is the symbol for Kelvin?
A
K
15
Q
What is the base quantity for Kelvin?
A
temperature
16
Q
What is the base unit of an amount of substance?
A
mole
17
Q
What is the symbol for mole?
A
mol
18
Q
What is the base quantity for a mole?
A
Amount of substance
19
Q
What are derived units?
A
units that are made up out of base units
20
Q
What are units that are made up out of base units?
A
derived units
21
Q
What is the unit for force?
A
Newton
22
Q
What does a Newton measure?
A
force
23
Q
What is the unit for energy?
A
Joule
24
Q
What does a Joule measure?
A
energy
25
What is the unit for pressure?
Pascal
26
What does a Pascal measure?
pressure
27
What is the unit for power?
Watt
28
What does a watt measure?
power
29
What is the unit for electric charge?
Coloumb
30
What does a Coulomb measure?
electric charge
31
What is the symbol for Newton?
N
32
What is the symbol for Pascal?
Pa
33
What is the symbol for Joule?
J
34
What is the symbol for watt?
W
35
How do you multiply scientific notation?
multiply numbers and add exponents
36
How do you divide scientific notation?
divide numbers and subtract exponents
37
What is precision?
how well repeated measurements of a value agree with one another (exact)
38
What is how well repeated measurements of a value agree with one another (exact)?
precision
39
What is accuracy?
how well a measurement agrees with the true value (correct)
40
What is how well a measurement agrees with the true value (correct)?
accuracy
41
What is calibration?
an instrument that is precise but not accurate can be calibrated
42
What is an instrument that is precise but not accurate can be calibrated?
calibration
43
When using an analog scale, what is the uncertainty?
plus or minus half the smallest scale division
44
On what scale is it when the uncertainty is plus or minus half the smallest scale division?
analog scale
45
When using a digital scale, what is the uncertainty?
plus or minus the smallest unit shown
46
On what scale is it when the uncertainty is plus or minus the smallest unit shown?
digital scale
47
When taking repeated measurement how do you find the uncertainty?
find the difference between the average and the measurement that is furthest from the average
48
When multiplying or dividing quantities, how do you find the resultant uncertainty?
add the percentage uncertainties of the quantities that we are multiplying
49
When adding or subtracting quantities, how do you find the resultant uncertainty?
add the absolute uncertainties of the quantities we are measuring
50
How do you find the order of magnitude?
Put things in 10's and see how many you need (exponent) for estimation
51
What is the order of magnitude for the size of subatomic particles to the extent of the visible universe?
10^-15 m to 10^25 m
52
What is the order of magnitude for the mass of the electron to the mass of the universe?
10^-30 kg to 10^50 kg
53
What is the order of magnitude for time for light to cross a nucleus to the age of the Universe?
10^-23 s to 10^18 s
54
What is the order of magnitude for the size of a hydrogen atom?
10^-10 m
55
What is the order of magnitude for the size of a proton?
10^-15 m
56
What is the ratio of diameter of a hydrogen atom to its nucleus?
10^-10/10^-15 = 10^5
57
What is displacement?
the distance moved in a stated direction (the distance and direction from the starting point)
58
What is the distance moved in a stated direction (the distance and direction from the starting point)?
displacement
59
Is displacement a vector?
Yes
60
What is velocity?
the rate of change of displacement
61
What is the rate of change of displacement?
velocity
62
Is velocity a vector?
Yes
63
What is acceleration?
the rate of change of velocity
64
What is the rate of change of velocity?
acceleration
65
Is acceleration a vector?
Yes
66
What is average speed/velocity?
change in distance/displacement divided by time taken over a period of time
67
What is the change in distance/displacement divided by time taken over a period of time?
average speed/velocity
68
What is instantaneous speed/velocity?
the change in distance/displacement divided by time at one particular time
69
What is the change in distance/displacement divided by time at one particular time?
instantaneous speed/velocity
70
Is motion relative?
Yes
71
What is a frame of reference?
a point from which a situation is observed
72
What is a point from which a situation is observed?
a frame of reference
73
What is a scalar quantity?
can be described by a number with units
74
What is a vector quantity?
must be described by a number (its magnitude) and its direction
75
How do you find displacement?
s2-s1
