問題一覧
1
It s an experimental science
physics
2
Units of measurement
cultural
3
Write cultural measurement
cubits, foot, mile, span
4
Write the three fundamentals SI units
time, length, mass
5
Ot is now tied to kr discharge
meter
6
10^18
atto
7
10^15
femto
8
10^12
pico
9
10^9
nano
10
10^6
micro
11
10^3
milli
12
10^2
centi
13
10'3
kilo
14
10'6
mega
15
10'9
giga
16
10'12
tera
17
10'15
peta
18
10'18
exa
19
Hwow any grams in 1 pound
2.54
20
How many cm in 1 inch
454
21
How mang quars in 1 liter
1.06
22
Formula of distance
d = time * speed
23
Observe phenomena in nature
physics
24
Originally tide of the length of the day
the second
25
Exceptionally accurate,in fact redefining c, speed of light
meter
26
New definition is the distance that light can travel in a vaccuum
meter
27
So accurate that it loses only 1 second in 30m years
meter
28
The reference cylinder is kept in sevres, france
kilogram
29
A more modern , atomic reference is hoped for
kilogram