Physics Reference Tables
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4Physics Reference Tables
Physical Constant
Symbol
Value
Acceleration due to gravity on
g
9.8 m / s / s
Earth
2
Nm
9.0
10
9
Coulomb’s law constant
k
2
C
Elementary charge
e
1.6
10
19
C
m
9.11
10
31
kg
Electron rest mass
e
2
Nm
11
6.67
10
Gravitational constant
G
kg
2
m
1.67
10
27
kg
Proton rest mass
p
3.00
10 m / s
8
Speed of light in a vacuum
c
Speed of sound in air at STP
331 m / s
The Index of Refraction
for Common Substances
Air
1.00
Alcohol
1.36
Corn Oil
1.47
Diamond
2.42
Glass, Crown
1.52
Glass, Flint
1.61
Glycerol
1.47
Quartz, Fused
1.46
Water
1.33
NCDPI Reference Tables for Physics (2012) Version 2
Page 1
Stock No. 14156
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