Edexcel A2 Physics Unit 5 'Physics from Creation to Collapse'

Oscillations is the topic I find difficult in phy5

We did that for the coursework. Feel quite good about it, it's only the life cycle of stars that seems really complex.

Also, this is a synoptic paper right? That could be what ruins me.

yeah its synoptic.

So do you think I should revise all of Unit 2? I resat Unit 1 so that's fresh in my mind but I can't remember much about waves and the rest of that paper.

yeah its synoptic.

Not sure if there area any experiments to that specific equation but I think I remember the experiments for the different ideal gas laws.

Boyle's law - for a gas of constant mass and constant temperature, the pressure of a gas is inversely proportional to its volume.

To illustrate this, just set up a gas supply to a barometer and a measuring tube full of a liquid. If you add small amounts of the gas to the measuring tube, and plot a graph of pressure (read from the barometer) against volume (read from the tube), then it should be a reciprocal graph (i.e. like that of y = 1/x).

Charles' law - for a gas of constant mass and constant pressure, the volume it occupies is directly proportional to its absolute temperature.

To illustrate this, just connect a gas supply to an upturned measuring cylinder which is suspended in a beaker of water, on top of a gauze and just above a Bunsen burner. Add a barometer as well and a thermometer inside the beaker. If you change the flame on the Bunsen burner, and plot a graph of absolute temperature (read off the thermometer, and then added 273 to it to make it in Kelvins) against the volume occupied (read from the amount of gas in the cylinder) and it should be a straight line passing through the origin (with a positive gradient).

Guy-Lussac law - for a gas of constant mass and constant volume, the pressure of the gas is directly proportional to its absolute temperature.

To illustrate this, just use the same apparatus as in demonstrating Charles' law, but replace the upturned measuring cylinder with a spherical flask directly connected to a barometer, and plot a graph of pressure against absolute temperature, it will be a straight line passing through the origin (with a positive gradient).

THank you

For the synoptic area of the paper, how much in depth do you think we need to revise the older units? I'm thinking of just reading through summary sheets, and not actually learning it all. Is that enough, do you think?

THank you

For the synoptic area of the paper, how much in depth do you think we need to revise the older units? I'm thinking of just reading through summary sheets, and not actually learning it all. Is that enough, do you think?

yeah its synoptic.

Someone linked on the Unit 4 thread a collection of 190 past paper questions, is there one of one those for Unit 5?

Also I'm a little confused when it mentioned the potential energy as being part of the internal energy. What does it mean by the potential?

Someone linked on the Unit 4 thread a collection of 190 past paper questions, is there one of one those for Unit 5?

Also I'm a little confused when it mentioned the potential energy as being part of the internal energy. What does it mean by the potential?

The particles in a heated object have mass, and so they have gravitational fields. As a result, other particles have (gravitational) potential energy relative to the other particles.

Ah, cheers, makes sense.



Thanks for the link, but the 'Unit 5' link seems to have only questions on unit 1 stuff from what I can see?

Edit: Just noticed the "Topics" section though, looks good.

Unit 5 is N.O.T. synoptic.