__https://spark.iop.org/collections/energy-new-curriculum#gref__

__https://spark.iop.org/energy-cpd-videos__

“The property of matter and radiation which is manifest as a capacity to perform work (such as causing motion or the interaction of molecules).”

‘It is not a description of a mechanism, or anything concrete; it is just a strange fact that we can calculate some number and when we finish watching nature go through her tricks and calculate the number again, it is the same.’ Richard Feynman

‘The moving pencil uses kinetic energy.’ (QCA)

‘The steam [from a volcano vent] is converted into energy and transported to Europe via a 1,200-mile sea-floor cable.’ (a London newspaper)

‘Carbonaceous matter is converted to heat or other forms of energy.’ (

*Physics World*)‘Energy makes things happen.’ (ASE

*Big Ideas*)‘The bulb lights because energy flows from the battery to the bulb.’ (Sophie, Year 9)

*Energy is truly lost in many energy transformations.**There is no relationship between matter and energy.**If energy is conserved, why are we running out of it?**Energy can be changed completely from one form to another (no energy losses).**Things “use up” energy.**Energy is confined to some particular origin, such as what we get from food or what the electric company sells.**An object at rest has no energy.**The only type of potential energy is gravitational.**Gravitational potential energy depends only on the height of an object.**Doubling the speed of a moving object doubles the kinetic energy.**Energy is a “thing.”**The terms “energy” and “force” are interchangeable.**From the non-scientific point of view, “work” is synonymous with “labor.” It is hard to convince someone that more “work” is probably being done playing football for one hour than studying an hour for a quiz.*

treat energy as a substance (when it is a calculation tool)

are ambiguous and inconsistent

Use energy like phlogiston

give causal powers to energy

Thomas young.

Though it is often reported that Joule took a thermometer with him on his honeymoon, and made measurements of the temperature of a waterfall, Joule’s biographer reports that the story only appeared 35 years after the alleged event and is likely a fable.

Aside: __https://spark.iop.org/stories-physics__

In physics, **energy** is a property of objects which
can be transferred to other objects or converted into different forms,
but cannot be created or destroyed.

•Forces tell you WHY things happen

•Energy tells you IF they can happen

1 tonne of water flowing down a 100 metre hill

1kg of boiling water cooling down

A 2 tonne truck at 70 mph coming to rest

Burning 20g of nightlight candle

Lying in bed for 4 hours.

A 2 tonne truck at 70 mph coming to rest

How much energy will be gained by the brakes, air etc when the lorry has come to a stop?

Things we know:

1.The purpose of teaching energy is to do calculations — it is about
__amounts__

2.Energy is always __conserved__.

3.Energy is just a number.

4.The numbers always add up.

__https://www.dropbox.com/sh/ruffc3qpi95by7x/AABzd5AH1Ei-cT_0VJs3-K9Da?dl=0?dl=0__

__https://www.dropbox.com/sh/ruffc3qpi95by7x/AABzd5AH1Ei-cT_0VJs3-K9Da?dl=0__

If students have access to a few of these toys and the time to play, a lot of questions arise:

Which toy will achieve the greatest height?

Which toy will jump first? Why?

What height will the toy achieve jumping upside down?

You can lead them further with a few well placed questions:

How much force do you need to compress the rubber?

The toy will undergo an acceleration: When will this acceleration be at its maximum? What would increase it or decrease it?

How could I make it jump higher?

What happens if you stack two of them?

__https://www.dropbox.com/s/moj2qqa4l8za5wp/RMfI2jL6lTZjoeoH.mp4?dl=0__

Following from:

First we need to know how heavy the ship was. The X-Wing’s mass has never been canonically established, but its length has—12.5 meters. An F-22 is 19 meters long and weighs 19,700 kg, so scaling down from this gives an estimate for the X-Wing of about 12,000 lbs (5 metric tons).

$$m_{x} = m_{f22} \times \left(\frac{12.5}{19}\right)^{3} \approx 5,600\mathrm{kg}$$

The front landing strut rises out of the water in about three and a
half seconds, and I estimated the strut to be 1.4 meters long (based on
a scene in *A New Hope* where a crew member squeezes past it),
which tells us the X-Wing was rising at 0.39 m/s.

Lastly, we need to know the strength of gravity on Dagobah. Here, I figure I’m stuck, because while sci-fi fans are obsessive, it’s not like there’s gonna be a catalog of minor geophysical characteristics for every planet visited in Star Wars. Right?

Nope. I’ve underestimated the fandom. Wookieepeedia has just such a catalog, and informs us that the surface gravity on Dagobah is 0.9g. Combining this with the X-Wing mass and lift rate gives us our peak power output:

$$\frac{5,600 \mathrm{kg} \times 0.9\mathrm{g} \times 1.4 \text{ meters}}{3.6 \text{ seconds}} = 19.2\mathrm{kW}$$

__https://www.smbc-comics.com/index.php?db=comics&id=2305__

__https://www.gridwatch.templar.co.uk/__

__https://www.dropbox.com/sh/1j8xvbgtdsmv0sf/AADcAVs3whptFUz1k21SWEwka?dl=0?dl=0__

__https://www.dropbox.com/sh/1j8xvbgtdsmv0sf/AADcAVs3whptFUz1k21SWEwka?dl=0__

__https://www.dropbox.com/sh/e34iju1d8dahgxv/AACesqKdMaMzn06e1vmnnaXOa?dl=0?dl=0__

__https://www.dropbox.com/sh/e34iju1d8dahgxv/AACesqKdMaMzn06e1vmnnaXOa?dl=0__