Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Physics Yr11 > Yr11 > Flashcards

Yr11 Flashcards

0
Q

Mass is unchanged throughout the universe. True or False?

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

What is mass?

A

The amount of matter in an object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How to calculate weight?

A

W = Gravity X Mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the definition of weight?

A

Weight is the pull of gravity on an object, multiplied by the object’s mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How to calculate density?

A

Density = Mass / Volume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Name the properties of solids relating to Kinetic Theory?

A
  • keeps own shape
  • keeps own volume
  • very high density
  • can’t be compressed
  • strong force between particles
  • atoms vibrate, fixed to each other with respect
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Name properties of liquids, relating to Kinetic Theory?

A
  • takes shape of container
  • keeps own volume
  • medium density
  • can be compressed a little
  • strong force between particles
  • vibrate, move within volume
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Name properties of gas, relating to Kinetic Theory?

A
  • takes shape of container
  • takes volume of container
  • low density
  • can be compressed by great deal
  • weak force between particles
  • vibrate, move anywhere
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the Centre of Gravity?

A

A point in which an object’s weight appears to be concentrated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

In order for an object to be stable, the Centre of Gravity must be above what?

A

The base

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What 2 ways could an object become more stable?

A
  • wider base

- lower Centre of Gravity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is a Moment?

A

A moment is the turning force of something

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Equation for moments?

A

M = Force X perpendicular distance from force to pivot

M = Fd

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

When an object is balanced and the Clockwise and Anti - Clockwise moments are equal, it is in what?

A

Equilibrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the principle of moments?

A

When an object is in equilibrium, the clockwise and anti - clockwise moments are equal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the evidence for the existence of Nuclei?

A

When alpha particles are fired at gold foil, some are deflected by something ‘ hard ‘ and positive. This ‘ hard ‘ positive object is the nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Who discovered Nuclei?

A

Rutherford

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Diameter of atoms?

A

-10

Approx. 10 m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Diameter of nuclei?

A
  • 15

Approx. 10 m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What material stops alpha particles?

A
  • A sheet of paper

- skin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What material stops Beta Particles?

A

Aluminium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What material reduces Gamma Rays?

A
  • Lead

- Concrete

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Relative Mass of Gamma rays?

A

No mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Relative Mass of a beta particle?

A

1/1840

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Relative Mass of alpha particles?
4
25
Charge of an alpha particle?
+2
26
Charge of a beta particle?
-1
27
Charge of gamma rays?
No charge
28
Composition of an alpha particle?
2 protons and 2 neutrons
29
Do Alpha Particles ionise other atoms?
Yes
30
Do Beta Particles ionise atoms?
Yes, but not as strongly as Alpha Particles do
31
Do Gamma Rays ionise atoms?
No, but they cause them to emit other particles, resulting in Ionisation
32
Is it possible to find a PURE gamma ray source?
No, anything that emits gamma rays, emits alpha and/ or beta particles
33
What is Carbon Dating?
The process of analysing the amount of Carbon 14 in something, to calculate its age, based on half - lives
34
Sources of background radiation?
- cosmic rays - animals - rocks - soil and plants
35
What is a half - life?
A half - life is the time it takes for half of the radioactive nuclei of an isotope to decay on avg.
36
What is nuclear fission?
The splitting of large nuclei, by firing a thermal neutron at the right speed at it
37
What is Nuclear Fusion?
The joining of two atomic nuclei to make a larger nuclei. This processes creates energy.
38
Where can Nuclear Fusion naturally occur?
Stars
39
Does the process of Nuclear Fusion create harmful waste?
No
40
What is a transducer?
A transducer changes energy from one form to another. Eg. Electrical to Light
41
Coal, oil and gas are all what types of fuel?
Fossil Fuels
42
What is the Energy Efficiency equation?
Energy Output _____________ X 100 Energy Input
43
Name the 9 types of energy
Chemical, Light, Elastic Potential, Gravitational Potential, Kinetic, Electrical, Heat, Sound and Magnetic
44
How to Calculate velocity?
Displacement ---------------- Time
45
Definition of Displacement?
Displacement is a vector measure of the interval between 2 locations measured along the shortest path connecting them
46
How to calculate Displacement in a Velocity/Time graph?
Area of shape created by line
47
How to calculate acceleration of Velocity/Time Graph?
Gradient of line
48
How to work out velocity of Displacement/Time graph?
Gradient of line
49
How to calculate acceleration?
Change in Velocity ---------- Time
50
What is Newton's First Law?
Every object travels with a constant speed in a straight line, or remains at rest, unless acted upon by an unbalanced force
51
What is Newtons Second Law?
Unbalanced Force = Mass x Acceleration
52
What is Newton's Third Law?
If body A exerts a force on Body B, then Body B exerts a force of equal size and opposite direction on Body A
53
What is the definition of a Newton?
A force which gives a mass of 1kg an acceleration of 1m/s2
54
How to calculate Momentum?
Momentum = Mass x Velocity
55
How to Calculate an Impulse?
Impulse = Force x Time
56
What is the Law of Conservation of Momentum?
So long as no external forces are acting on the objects involved, the total momentum before a collision is the same as the total momentum after a collision
57
What would happen to an object moving in a circle if force making it move disappeared?
Object would move away in a tangent
58
How to calculate Work Done?
Force x Distance moved in direction of force
59
How to calculate Power?
Work Done ----------- Time taken OR Energy Change ------------ Time taken
60
What is power?
Power is the rate of doing work, or rate at which energy changes from one form to another
61
How to calculate Gravitational Potential Energy?
Mass x Gravity x Height
62
How to calculate Kinetic Energy?
0.5 x Mass x (Velocity)2
63
What is the Law of Conservation of Energy?
Energy cannot be destroyed or created but only changes form

Physics Yr11 (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions