Physics

Question 1

What is the formula for density

Answer 1

Density=mass/volume

Question 2

What is the practical method to figure out the density

Answer 2

Measure the length, width, height. Measure the mass of each object using the digital balance. Calculate the the volumes. Calculate the density

Question 3

What are the three state of matters

Answer 3

Solids, liquids, gases

Question 4

What are some factors of solids

Answer 4

Particles are close together, can’t be compressed, vibrate around a fixed point, arranged in a regular pattern

Question 5

What are some factors of liquids

Answer 5

Particles are very close together, particles move and slide over each other, can’t be compressed, particles are in an irregular pattern

Question 6

What are some factors of gases

Answer 6

Particles are spread far apart, particles move quickly and in random directions, can be compressed

Question 7

Specific heat capacity definition

Answer 7

Energy required to raise one kilogramme of substance by 1 degree Celsius

Question 8

What is the change from solid to liquid called

Answer 8

Melting point

Question 9

What is the change from liquid to gas called

Answer 9

Boiling point

Question 10

Specific latent heat definition

Answer 10

The specific latent heat is the amount of energy needed to change the state of one kilogramme of a substance without a change in temperature

Question 11

What is an atom

Answer 11

The smallest particle of a chemical element

Question 12

What is an ion

Answer 12

Electrically charged particles form when an atom gains or loses an electron

Question 13

What is an isotope

Answer 13

Tap or more forms of the same element that contain number of protons but different number of neurons

Question 14

What is ionisation

Answer 14

An atom gains a negative or positive charge by gaining or losing electrons

Question 15

What is radiation

Answer 15

The emissions of energy as electro magnetic waves or as moving subatomic particles

Question 16

What is ionising radiation

Answer 16

Radiation consisting of particles, X rays or gamma rays with sufficient energy to cause ionisation

Question 17

What does radioactive mean

Answer 17

Emission of ionising radiation

Question 18

What element is alpha decay identical to

Answer 18

Helium

Question 19

What is beta decay

Answer 19

A beta particle is a fast moving electron

Question 20

What is half life?

Answer 20

The active time it takes for the number of nuclei in a radioactive isotope to half

Question 21

What is nuclear fission?

Answer 21

Nuclear fission is the nucleus of a fissionable element splitting into smaller nuclei when absorbing a neutron which causes a chain reaction of fissions creating energy

Question 22

What is nuclear fusion?

Answer 22

Nuclear fusion is when two small nuclei release energy when they are fused together to form a single nuclei

Question 23

What is the difference between nuclear fusion and fission?

Answer 23

Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy

Question 24

What was Ernest Rutherfords experiment?

Answer 24

He released alpha particles to prove atoms showing some alpha particles reflected while some went straight through

Question 25

What is a vector?

Answer 25

A quantity represented by an arrow with direction and magnitude

Question 26

What is a scalar?

Answer 26

A quantity with magnitude only

Question 27

What is magnitude?

Answer 27

The great size of extent

Question 28

What is a gravitational field?

Answer 28

A gravitational field is the area around an object acting like a force field with the gravitational force decreasing as you get further away