P1 - S.I Units, Mass, Weight and Density, and Motion Flashcards

1
Q

What are units?

A

a way of expressing a quantity

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2
Q

What is the unit for distance?

A

metres (m)

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3
Q

What are the units for Mass?

A

kilograms (kg)

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4
Q

What are the units for time?

A

seconds (s)

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5
Q

What are the units for temperature?

A

Celsius (°C)

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6
Q

What does S.I. unit mean?

A

system of international unit

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7
Q

x10 to the power of 3

A

kilo (k)

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8
Q

x10 to the power of 6

A

mega (M)

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9
Q

x10 to the power of 9

A

giga (G)

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10
Q

x10 to the power of 1

A

deca (da)

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11
Q

x10 to the power of 2

A

hecto (H)

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12
Q

x10 to the power of -3

A

milli (m)

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13
Q

x10 to the power of -2

A

centi (c)

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14
Q

x10 to the power of -1

A

deci (d)

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15
Q

x10 to the power of -6

A

micro (ll)

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16
Q

x10 to the power of -9

A

nano (n)

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17
Q

What is the symbol for micro?

Think of micro meter

18
Q

S.F.

A

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.

19
Q

V=IR

A

voltage = current x resistance

20
Q

ways to measure length

A

ruler, (1/10 of a cm) scale, tape, vernier calliper, (1/100 of a cm) micrometer screw gauge (1/1000)

21
Q

What is the equipment that is used to measure Mass?

A

A top pan balance

22
Q

What is the equipment that is used to measure Time?

A

stopwatch, timer, clock

23
Q

ways to measure volume

A

measuring cylinder

24
Q

What is the equipment that is used to measure temperature?

A

A Thermometer

25
What is the Diffrence betwen Scalars and Vectors
A Scalar is only a magnitude But Vectors Have Both magnitude and Directions
26
distance definition
the path followed between two points - is scalar
27
displacement definition
the shortest distance between two points - is vector
28
speed definition, equation, S.I. unit
change in distance with respect to time - is scalar speed = distance/time S.I. unit - m/s = ms to the power of -1
29
What is the Equation, Symbol, and units for velocity
velocity = displacement/time units = km/h, m/s
30
How do you tell is an objest is deccelerating on a time distance graph
A negative gradent
31
What is the formual for acceleration? | Only the units
a = Δv/Δt Acceleration=Change in velocity/Change in Time
32
mass definition
mass is a property of all matter that creates gravitational fields
33
weight definition
the force pulling a mass towards another mass
34
weight equation
weight = mass x gravitational constant
35
gravitational constant on earth
9.8 (N/kg or m/s squared)
36
weight unit
neutons (N)
37
volume definition (2)
how much space an object takes up is 3-dimensional
38
density equation
density = mass / volume
39
density S.I. unit
kg/m cubed
40
density symbol
ρ