Back to basic physics

Question 1

what is matter

Answer 1

matter is anything that takes up space
an objects

Question 2

what is the weight of an object

Answer 2

this is the force of gravity acting upon the objects mass and it is measured in newtons NOT KG

weight= mass x gravitational field strength(9.8)

Question 3

what is potential energy

Answer 3

this is energy stored in an object due to its position or state

Question 4

what is kinetic energy

Answer 4

this is the energy an object possesses when in motion

Question 5

what is work done on an object

Answer 5

this is when force is applied to an object causing it to move
Work done = force x distance

Question 6

what is density of an object

Answer 6

this is the amount of mass ann object has per unit volume

density = mass/volume

Question 7

what is heat

Answer 7

this is the transfer of energy from one object of matter to the other

Question 8

what is heat transfer

Answer 8

this occurs due to a difference of temperature between 2 objects (temperature gradient)

heat will flow from objects of higher temperatures to objects of lower temperatures until the temperature of both object of matter are equal

(refer to the 2nd law of thermodynamics)

Question 9

what is conduction

Answer 9

this is the heat transfer that occurs when particles of a substance collide

conduction occurs in solids

Question 10

what is convection

Answer 10

this is when particles of gasses and liquids closest to the heat source are heated by conduction causing them to rise

an example would be heating water in a pan on a stove

Question 11

what is radiation

Answer 11

this is the heat transfer that occurs when a wave hits an object

when a wave hits an object, it transfers kinetic energy to the object causing its temperature to rise

(this is how we feel heat from the sun)