Sunday, 10 May 2020

Term 2 Week 4 2020

Homework:

Ex 4D, p.128-131, Banked Corners (Circular Motion)
Ex 4E, p. 138-142, Vertical Circles
Ex 4F, p.145-147, Gravity
Ex 4G, p.153-156, Circular Motion & Gravity

PhET - Gravity Force Lab

PhET - Gravity & Orbits

Gravitation: The Four Fundamental Forces of Physics

Introduction to Newton's law of gravitation | Physics | Khan Academy

Speed of a Satellite in Circular Orbit, Orbital Velocity, Period, Centripetal Force

Gravity Visualised

How Do Satellites Get & Stay in Orbit?

Kepler’s First Law of Motion - Elliptical Orbits

Kepler’s Second Law of Motion - Equal Area Equal Time Law

Kepler's Third Law of Motion - T2 ∝ R3

Sunday, 3 May 2020

Term 2 Week 3 2020

Homework

Ex 4D, p.128-131, Banked Corners (Circular Motion)
Ex 4E, p. 138-142, Vertical Circles

Vertical Circular Loop Model - app

Vertical Circular Motion

Walter Lewin Vertical Circular Motion

Banked Corners

Circular Motion - Banked Curves

Car on a Banked Corner

Free body diagram sine and cosine components

Tuesday, 14 April 2020

Term 2 Week 1 2020

Homework:

Ex 4A, p.100-102, C.O.M.
Ex 4B, p.108-112, Momentum & C.O.M. in 1D
Ex 4C, p.116-122, Momentum & C.O.M. in 2D
Act 7A, p.87-88 Motion, Force and Energy
Act 7B, p.91-92 Impulse
Act 7C, p.95-96 Conservation of Momentum
Act 7D, p.100-101 C.O.M.

Centre of Mass (C.O.M.)

Center of Mass - Science Theater 29

Center of Mass

PhET - Collision Lab - Momentum & C.O.M.

Centre of Mass + Momentum

Collision and C.O.M.

Momentum Collision in 2 Dimensions

Momentum in 2D Explained Graphically

How Hard Can You Hit a Golf Ball?

Sunday, 22 March 2020

Term 1 Week 1 2020

Phy 3.7 Nuclear Debate

Thursday 11th April

Renewable Energy and Electricity
World Nuclear Association 2019

There is widespread popular support for using renewable energy, particularly solar and wind energy, which provide electricity without giving rise to any carbon dioxide emissions.
Harnessing these for electricity depends on the cost and efficiency of the technology, which is constantly improving, thus reducing costs per peak kilowatt, and per kWh.
Utilising electricity from solar and wind in a grid becomes problematical at high levels for complex but now well-demonstrated reasons. Supply does not correspond with demand.
Back-up generating capacity is required due to the intermittent nature of solar and wind. System costs escalate with increasing proportion of variable renewables.
Policy settings to support renewables are generally required to confer priority in grid systems and also subsidise them, and some 50 countries have these provisions.
Utilising solar and wind-generated electricity in a stand-alone system requires corresponding battery or other storage capacity.
The possibility of large-scale use of hydrogen in the future as a transport fuel increases the potential for both renewables and base-load electricity supply.

Debate: Is Nuclear Power the Answer to Climate Change?

On May 3, 2016, renewable energy expert Professor Daniel Kammen of the University of California Berkeley debated nuclear power advocate Lauri Muranen, executive director of the World Energy Council, Finland, on the question: "Is nuclear power the answer to climate change?" The event, part of the Einaudi Center's annual Lund Critical Debate Series, was moderated by Cornell law and anthropology professor Annelise Riles.

Wave Power Station

Tidal Current Turbine

Worlds Largets Battery

Wells Turbine

Understanding the accident of Fukushima Daiichi

88,000 tons of radioactive waste – and nowhere to put it

The Eyes of Nye S01 E05 Nuclear Energy

Is Nuclear Power Good Or Bad?

How fear of nuclear power is hurting the environment

Thursday, 20 February 2020

Term 1 Week 4 2020

Homework:

Activity 11A, p.176 Waves & Photons (last week)
Activity 11B, p.179 Photoelectric Effect (last week)
Activity 11C, p.183 Atomic Line Spectra
Activity 11D, p.188-189 Bohr Model of Hydrogen Atom
Ex 5A, p.197-198 Quantum (Revision)
Ex 5B, p.205-108 Photo-electric effect (Revision)
Ex 5C, p.212-215 Ek = hf - φ
Ex 5D, p.221-222 Bohr Model of Hydrogen Atom
Activity 12B, p.199-200 Nuclear Reactions
Ex 5F, p.234-236 Mass-Energy
Ex 5G, p.242-246 E = mc^2

Nuclear Fission

Nuclear Fission; splitting the atom for beginners

Nuclear Physics: Crash Course Physics #45

Nuclear Chemistry: Crash Course Chemistry #38

Nuclear Chemistry Part 2: Fusion and Fission - Crash Course Chemistry #39

Nuclear Fission

The breaking up of a larger nucleus into smaller nuclei
The decrease in mass per nucleon, matches the increase in binding energu per nucleon
This binding energy per nucleon is a negative energy and represents energy that is lost (radiated away) during the reaction.
Binding energy per nucleon also represents the energy that would need to be added to liberate a nucleon from the nucleus

Nuclear Fission

Fission & Fusion

Nuclear Fusion

The joining of smaller nuclei into a larger nucleus
The decrease in mass per nucleon, matches the increase in binding energu per nucleon
This binding energy per nucleon is a negative energy and represents energy that is lost (radiated away) during the reaction.
Binding energy per nucleon also represents the energy that would need to be added to liberate a nucleon from the nucleus

Nuclear Fusion

Fusion Energy

Binding Energy per Nucleon

Nuclear Reaction E = mc²

Binding Energy per Nucleon

Binding Energy per Nucleon is a negative energy or a debt of energy. This is the amount of energy it would take to liberate a nucleon from the nucleus. This energy was originally radiated off when the nucleus formed.

The energy radiated off, the Binding energy, is lost energy and comes from mass that is lost by the nucleons. Mass per Nucleon shows what is left over once a bound nucleon has radiated away some of its mass.

Mass per Nucleon

Fission:The breaking up of a larger nucleus into smaller daughter nuclei. Anything above Iron will radiate off energy.

Fusion:
The joining of smaller nuclei into a larger nucleus. Anything below Iron will radiate off energy.

Fission & Fusion