Mass, Weight and Density

Question 1

what is mass?

Answer 1

it is a measure of the amount of substance/matter in an object

Question 2

what is the si unit of mass?

Answer 2

kilogram (kg)

Question 3

is mass a scalar or vector quantity?

Answer 3

scalar quantity

Question 4

does gravitation field strength have an effect on mass?

Answer 4

mass is constant everywhere, it is not affected by gravitational field strength

Question 5

what can be used to measure mass?

Answer 5

it can be measured by a beam balance or electronic balance

Question 6

what is a gravitational field?

Answer 6

it is a region in which a mass experiences the gravitational force of attraction

Question 7

define gravitational field strength

Answer 7

the gravitation force per unit mass

Question 8

what is the unit for gravitational field strength?

Answer 8

g : Nkg-1 or m/s2

Question 9

what is the approximate gravitational field strength on earth?

Answer 9

10N/kg

Question 10

what affects weight?

Answer 10

the weight of an object depends on the gravitational field strength acting on it

Question 11

can weight change?

Answer 11

the gravitational field strength varies in different places so weight can change

Question 12

what can be used to measure weight?

Answer 12

a spring balance

Question 13

what is the formula used to find weight?

Answer 13

W=mg

Question 14

what is the unit for weight?

Answer 14

newtons (N)

Question 15

what is difference between mass and weight in terms of measurement?

Answer 15

mass is a measurement of the quantity of matter in a body

weight is a measurement of gravitational force acting on a body

Question 16

what is the difference between mass and weight in terms of ways to be measured?

Answer 16

mass is measured by a beam balance or electronic balance

weight is measured by a spring balance

Question 17

what is difference between mass and weight in terms of quantity?

Answer 17

mass is a scalar quantity

weight is a vector quantity

Question 18

what is the difference between mass and weight in terms of what it is affected by?

Answer 18

mass is constant everywhere

weight varies with gravitational field strength

Question 19

what is the difference between mass and weight in terms of si unit?

Answer 19

the si unit of mass is kilogram (kg)

the si unit of weight is netwon (N)

Question 20

define density

Answer 20

density is a measure of mass per unit volume

Question 21

what is the unit of density?

Answer 21

kg/m3 or g/m3

Question 22

how does density affect the compact of the matter?

Answer 22

the higher the density, the greater the compact of the matter

Question 23

what is the formula for density?

Answer 23

density=mass/volume

my dog vomits

Question 24

how to find the density of an alloy?

Answer 24

density=total mass/total volume

Question 25

how does density affect whether an object will float in a certain liquid?

Answer 25

if the object is denser than the liquid, it sinks

if the object is less dense than the liquid, it floats

Question 26

what is inertia?

Answer 26

it is the reluctance/resistance of an object to change its original state of motion

Question 27

what is inertia affected by?

Answer 27

mass

Question 28

how does mass affect inertia?

Answer 28

high mass -> high inertia -> difficult to start moving and stop moving the object
low mass -> low inertia -> easy to start moving and stop moving the object