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

Question 1

What are units?

Answer 1

a way of expressing a quantity

Question 2

What is the unit for distance?

Answer 2

metres (m)

Question 3

What are the units for Mass?

Answer 3

kilograms (kg)

Question 4

What are the units for time?

Answer 4

seconds (s)

Question 5

What are the units for temperature?

Answer 5

Celsius (°C)

Question 6

What does S.I. unit mean?

Answer 6

system of international unit

Question 7

x10 to the power of 3

Answer 7

kilo (k)

Question 8

x10 to the power of 6

Answer 8

mega (M)

Question 9

x10 to the power of 9

Answer 9

giga (G)

Question 10

x10 to the power of 1

Answer 10

deca (da)

Question 11

x10 to the power of 2

Answer 11

hecto (H)

Question 12

x10 to the power of -3

Answer 12

milli (m)

Question 13

x10 to the power of -2

Answer 13

centi (c)

Question 14

x10 to the power of -1

Answer 14

deci (d)

Question 15

x10 to the power of -6

Answer 15

micro (ll)

Question 16

x10 to the power of -9

Answer 16

nano (n)

Question 17

What is the symbol for micro?

Think of micro meter

Answer 17

μ

Question 18

S.F.

Answer 18

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.

Question 19

V=IR

Answer 19

voltage = current x resistance

Question 20

ways to measure length

Answer 20

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

Question 21

What is the equipment that is used to measure Mass?

Answer 21

A top pan balance

Question 22

What is the equipment that is used to measure Time?

Answer 22

stopwatch, timer, clock

Question 23

ways to measure volume

Answer 23

measuring cylinder

Question 24

What is the equipment that is used to measure temperature?

Answer 24

A Thermometer

Question 25

What is the Diffrence betwen Scalars and Vectors

Answer 25

A Scalar is only a magnitude
But Vectors Have Both magnitude and Directions

Question 26

distance definition

Answer 26

the path followed between two points - is scalar

Question 27

displacement definition

Answer 27

the shortest distance between two points - is vector

Question 28

speed definition, equation, S.I. unit

Answer 28

change in distance with respect to time - is scalar
speed = distance/time
S.I. unit - m/s = ms to the power of -1

Question 29

What is the Equation, Symbol, and units for velocity

Answer 29

velocity = displacement/time
units = km/h, m/s

Question 30

How do you tell is an objest is deccelerating on a time distance graph

Answer 30

A negative gradent

Question 31

What is the formual for acceleration?

Only the units

Answer 31

a = Δv/Δt
Acceleration=Change in velocity/Change in Time

Question 32

mass definition

Answer 32

mass is a property of all matter that creates gravitational fields

Question 33

weight definition

Answer 33

the force pulling a mass towards another mass

Question 34

weight equation

Answer 34

weight = mass x gravitational constant

Question 35

gravitational constant on earth

Answer 35

9.8 (N/kg or m/s squared)

Question 36

weight unit

Answer 36

neutons (N)

Question 37

volume definition (2)

Answer 37

how much space an object takes up
is 3-dimensional

Question 38

density equation

Answer 38

density = mass / volume

Question 39

density S.I. unit

Answer 39

kg/m cubed

Question 40

density symbol

Answer 40

ρ