P1 - S.I Units, Mass, Weight and Density, and Motion Flashcards
What are units?
a way of expressing a quantity
What is the unit for distance?
metres (m)
What are the units for Mass?
kilograms (kg)
What are the units for time?
seconds (s)
What are the units for temperature?
Celsius (°C)
What does S.I. unit mean?
system of international unit
x10 to the power of 3
kilo (k)
x10 to the power of 6
mega (M)
x10 to the power of 9
giga (G)
x10 to the power of 1
deca (da)
x10 to the power of 2
hecto (H)
x10 to the power of -3
milli (m)
x10 to the power of -2
centi (c)
x10 to the power of -1
deci (d)
x10 to the power of -6
micro (ll)
x10 to the power of -9
nano (n)
What is the symbol for micro?
Think of micro meter
μ
S.F.
the significant figure for a calculated quantity has to be given in the same number of S.F. as that of the quantity with the least S.F.
V=IR
voltage = current x resistance
ways to measure length
ruler, (1/10 of a cm) scale, tape, vernier calliper, (1/100 of a cm) micrometer screw gauge (1/1000)
What is the equipment that is used to measure Mass?
A top pan balance
What is the equipment that is used to measure Time?
stopwatch, timer, clock
ways to measure volume
measuring cylinder
What is the equipment that is used to measure temperature?
A Thermometer