Physics

Question 1

What is the difference between Speed and Velocity?

Answer 1

Speed is how fast you’re going with no regard to direction whereas Velocity must have a specified direction. So Velocity is Speed in a certain direction.

Question 2

The Y-axis on a distance-time graph represents what?

Answer 2

Distance

Question 3

What is acceleration?

Answer 3

How quickly Velocity is changing

Question 4

What unit is acceleration measured in?

Answer 4

m/s2 (squared)

Question 5

How can you notice acceleration on a Velocity-Time graph?

Answer 5

The Gradient of the line

Question 6

What unit is Weight measured in?

Answer 6

Newtons (N)

Question 7

What is Mass measured in?

Answer 7

Kilograms (KG) or Grams BUT IN ALL EXAM QUESTIONS USE KG!!!!!

Question 8

If a car is travelling with a driving force of 1000N and an Air Resistance of 600N what will the Resultant Force be?

Answer 8

400N

Question 9

What is Resultant Force?

Answer 9

The Overall force on an object

Question 10

What does an object need to start moving?

Answer 10

A Force

Question 11

What does a no resultant force mean on an object?

Answer 11

No change in Velocity

Question 12

A resultant force on an object means…

Answer 12

that the object accelerates.

Question 13

When two objects interact what are the forces they exert on each other?

Answer 13

Equal and Opposite

Question 14

What is a Positron? (Just for a bit of fun, Don’t need to know it)

Answer 14

The Anti-Matter counterpart of the Electron. It has the same mass and size but is positively charged

Question 15

What is the unit of measurement for Charge?

Answer 15

Coulombs (Q)

Question 16

What is the unit of measurement for Potential Difference (P.D)?

Answer 16

Volts (V)

Question 17

What is the unit of measurement for Current (I)?

Answer 17

Amperes (A)

Question 18

What is the unit of measurement for Energy?

Answer 18

Joules (J)

Question 19

What is Ohm’s Law?

Answer 19

V=I x R, There is a direct proportion between all 3 as one increases the others increase also.

Question 20

In a Series Circuit is the P.D the same across all components or shared equally from the original voltage (e.g. halved P.D for 2 components)?

Answer 20

The Potential Difference is shared equally across all components

Question 21

In a Parallel Circuit is the P.D the same across all components or shared equally from the original voltage (e.g. halved P.D for 2 components)?

Answer 21

The Potential Difference is the same across all of the components

Question 22

Why are Ammeters always connected in series?

Answer 22

To measure the Current going through the circuit

Question 23

Why are Voltmeters always connected in parallel?

Answer 23

To measure the Potential Difference either side of a component

Question 24

What is the frequency of mains electricity?

Answer 24

50 Hertz

Question 25

What colour is the live wire in a mains electrical appliance?

Answer 25

Brown

Question 26

What is the couloir of the neutral wire in a mains electrical appliance?

Answer 26

Blue

Question 27

What is the colour of the earth wire in a mains electrical appliance?

Answer 27

Green and yellow bands

Question 28

Name a type of circuit breaker

Answer 28

Residual Current Circuit Breaker (RCCB)

Question 29

How do circuit breakers protect the circuit if the current is too high?

Answer 29

They break the circuit by opening a switch

Question 30

How do fuses protect the circuit when the current is too high?

Answer 30

The fuse melts, thereby breaking the circuit

Question 31

Finish the Sentence: All resistors produce ......... when a current flows through them.

Answer 31

Heat

Question 32

What does it mean if an appliance is more efficient?

Answer 32

It wastes less energy

Question 33

Who came up with the idea of the nuclear model (a nucleus)

Answer 33

Rutherford and Marsden

Question 34

What factors influence the amount of radiation dose you receive?

Answer 34

Land and Occupation

Question 35

What charge does an Alpha particle have?

Answer 35

Positive Charge (+)

Question 36

What charge does Beta Particle have?

Answer 36

Negative charge (-)

Question 37

What is Half-Life?

Answer 37

The average time it takes for the number of nuclei in a radioactive isotope sample to halve

Question 38

What are some uses of radiation?

Answer 38

Smoke detectors Tracers in medicines Radiotherapy Sterilisation

Question 39

What are the effects of ionisation?

Answer 39

In large amounts kills cells | In small amounts can cause mutation (e.g cancer)

Question 40

Why is Lead used in radiation safety precautions?

Answer 40

It absorbs all 3 types of radiation

Question 41

What is Nuclear Fission?

Answer 41

The splitting up of large nuclei

Question 42

What is nuclear fusion?

Answer 42

The joining together of small nuclei

Question 43

What is the life cycle of a star that is about he same size as our sun?

Answer 43

Nebula-> Protostar-> Main Sequence Star-> Red Giant-> White Dwarf -> Black Dwarf

Question 44

What is the life cycle of a star larger than our sun?

Answer 44

Nebula-> Main Sequence Star-> Red SUPER Giant-> Supernova-> Neutron Star OR Black Hole

Question 45

Where are elements up to iron formed?

Answer 45

Inside late stages of a Red SUPER Giant

Question 46

Where are elements heavier than iron formed?

Answer 46

During a Supernova

Question 47

Did you know...

Answer 47

That a section of a Black Hole as large a pinhead would be impossible to lift by anyone or anything (You don't need to know that but it is rather interesting)