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SI System - Metric Units
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Terms in this set (31)
SI System
International System of Units, used world wide in science, base of 10
Base unit for length
Meter
Base unit for mass
Kilogram
Base unit for Temperature
Kelvin
Base unit for time
seconds
Base unit for amount
mole
Base unit for luminous intensity
candela
Base unit for electric current
ampere
Symbol for electric current
A
Symbol for time
s
Symbol for amount
mol
Symbol for mass
kg
Symbol for luminous intensity
cd
Symbol for length
m
weight
force that measures the pull on a given mass by gravity (changes based on location)
mass
measure of the quantity of matter (does not change based on location)
Mega symbol
M
Kilo symbol
k
deci symbol
d
centi symbol
c
milli symbol
m
micro symbol
u
nano symbol
n
pico symbol
p
Mega meaning
1 x 10^6 times bigger than base unit
kilo meaning
1 x 10 ^3 times bigger than base unit
deci meaning
10 times smaller than base unit
milli meaning
1000 times smaller than base unit
micro meaning
1 x 10 ^6 times smaller than base unit
nano meaning
1 x 10^9 times smaller than base unit
pico meaning
1 x 10 ^12 times smaller than the base unit
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Verified questions
PHYSICS
A 0.25 kg puck is initially stationary on an ice surface with negligible friction. At time t = 0, a horizontal force begins to move the puck. The force is given by $$ \vec { F } = \left( 12.0 - 3.00 t ^ { 2 } \right) \hat { i } $$ , with $$ \vec { F } $$ in newtons and t in seconds, and it acts until its magnitude is zero. (a) What is the magnitude of the impulse on the puck from the force between t = 0.750 s and t = 1.25 s? (b) What is the change in momentum of the puck between t = 0 and the instant at which F = 0?
PHYSICS
The flywheel of a steam engine runs with a constant angular velocity of 150 rev/min. When steam is shut off, the friction of the bearings and of the air stops the wheel in 2.2 h. (a) What is the constant angular acceleration, in revolutions per minute-squared, of the wheel during the slowdown? (b) How many revolutions does the wheel make before stopping? (c) At the instant the flywheel is turning at 75 rev/min, what is the tangential component of the linear acceleration of a flywheel particle that is 50 cm from the axis of rotation? (d) What is the magnitude of the net linear acceleration of the particle in (c)?
PHYSICS
In doing a load of clothes, a clothes dryer uses 16 A of current at 240 V for 45 min. A personal computer, in contrast, uses 2.7 A of current at 120 V. With the energy used by the clothes dryer, how long (in hours) could you use this computer to "surf " the Internet?
PHYSICS
Work previous problem for the case that the collision is inelastic and that Q is equal to one-fourth of the initial energy of the proton.