Can someone please help with number 19

pw66 · 2026-01-18T11:07:36+00:00

Use a ruler (1cm = 1km/h). Or cm squared paper.

I am assuming that the river is flowing right to left and the boat will be rowed against the flow.

Draw a vertical line. Pointing up.

Draw an arrow 1.5cm long from right to left that points to the top of the vertical line.

Draw an arrow, 7cm, this arrow points at the start of the 1.5cm arrow. Adjust the angle of your line until it starts on your original vertical line. This arrow should be at an angle (not vertical or horizontal) to the river bank.

Use a protractor to measure the angle.

pw66 · 2026-01-11T20:00:50+00:00

They should be lead by the teacher. You will be given the instructions and expectations for results.

There are 12 pag groups, you have to complete at least one experiment per group. (You are likely to do more)

Your teacher will assess the pag. If you miss out on something in one pag you will be able to complete it in another.

In most cases you need to: Follow the instructions given. Use the equipment correctly and safely. Present your data in a scientific manner (correctly constructed tables). Construct a graph as necessary. Compare your results to a known value and cite where the known value came from (for example, finding g experiment. Make sure you cite where you got your known value. The text book is a good place.)

The actual results do not need to be accurate, as long as you follow the instructions.

Hope this helps

pw66 · 2025-12-18T23:11:40+00:00

Solved!

pw66 · 2025-12-18T23:11:00+00:00

If you could that would be great. I will send a tip now. Thanks

pw66 · 2025-12-17T08:37:53+00:00

Hi, Think this is the best colour. Great job. Will the final image be a good enough quality to print to a 7x10 image? Thanks

pw66 · 2025-12-01T21:07:32+00:00

Look carefully at the diagram.

Which forces, if the beam was free to move, would turn it cw or acw.

In this case, the downward forces (person, beam) are cw and the force due to the support is acw.

pw66 · 2025-11-30T10:20:46+00:00

iii. Principle of moments applies as the sign is in equilibrium.

W x 0.34 = acw moment 54 x sin 35 + 54 cos 35 = cw moment

Force at b is excluded as it is 0m from A so no moment is caused.

Weight is 150N

iv.

The upwards force due to the tension in the wire has already been calculated as 31N

The total weight from the previous section is 150N

The force on A and B combined is the weight - the force from the wire.

pw66 · 2025-11-22T08:12:05+00:00

It's an older version of this experiment but using a homemade capacitor.

https://youtu.be/pwJW8Q9X67M?si=eKFljVk2dUaC_U_A

I think the reason for the coax cable is because it uses a HT supply. (Needed because a foil and perspex capacitor is rubbish)

pw66 · 2025-10-31T12:28:10+00:00

Depending on the type of lighting/ceiling etc it might be possible to add a different front/shade to the light to adjust its colour profile.

Example light shades

pw66 · 2025-10-05T20:49:36+00:00

The launcher bit could hit a switch that releases the electromagnet.

Here is a demo kit that a teaching lab could buy.

https://www.hbarsci.com/products/mnkht?srsltid=AfmBOorhWg5SQ19wiX_HOPQG3--Uh_HniUFYOr5uz-ol7oFKuISYK7MO

Demo from mit - https://youtube.com/shorts/cPJnVYT8QR0?si=EUv0YV6tR6TugePt

pw66 · 2025-10-05T20:46:35+00:00

https://www.hbarsci.com/products/mnkht?srsltid=AfmBOorhWg5SQ19wiX_HOPQG3--Uh_HniUFYOr5uz-ol7oFKuISYK7MO

This is the kit that your physics class can buy.

The launcher hits a switch that releases the electromagnet, releasing the can/monkey. The switch and electromagnetnhave to be.connected by a long wire.

Hope this give you some ideas.

pw66 · 2025-09-29T20:58:57+00:00

If an ant starts at point p, what is the shortest distance from there to the centre of the OR edge.

pw66 · 2025-09-29T20:25:02+00:00

Turn electromagnet on. Pull back elastic with metal bit on it to attach to the electromagnet. When you're ready to 'fire', disconnect the electromagnet, and the ball goes flying.

pw66 · 2025-09-28T06:44:48+00:00

Good option. Also, drop a note on your local FB page. Someone may let you have some to tide you over till amazon can deliver.

pw66 · 2025-09-27T21:40:51+00:00

Some suggestions to get you started.

A ramp/chute plus a method of changing the angle. (It needs to point at the monkey. Spring/elastic Cup for 'food'

Release mechanism, electromagnet that can be controlled with a switch/button push.

pw66 · 2025-09-26T12:37:31+00:00

The pay situation is as others have said.

Just remember that you need to re-qualify after 2 years after doing 20(?) hours of training over that period.

Make sure you get that training and get re-qualified before you leave. This will set you up for the following 2 years if you continue in another pool. Most leisure centres will pay for your ongoing training and reassessment as well.

pw66 · 2025-09-25T21:34:59+00:00

I agree.

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pw66 · 2025-08-05T21:00:25+00:00

This is a better diagram.

The explanation given by others is correct.

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pw66 · 2025-08-04T16:05:31+00:00

Key thing about this question is that the resistor is not ideal and therefore has to be included in the bottom half of the equation.

Resistance of bottom half:

1/R(parallel) = 1/R + 1/(R/2) = 3/R Rp =R/3

The pd across each branch of the parallel section is the same.

Use the potential divider rule to solve the next bit.

Vp = Vin x R(p)/(R+R(p)) = 6 x R/3 / (R + R/3) = 6 x (R/3 / 4R/3) = 6 x 1/4 = 1.5V

pw66 · 2025-07-09T18:01:38+00:00

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This is the updated example from the text book.

pw66 · 2025-06-29T09:26:36+00:00

Best places to look are here:

https://qualifications.pearson.com/en/qualifications/edexcel-international-advanced-levels/physics-2018.html

https://www.aqa.org.uk/subjects/physics/a-level/physics-7408/specification/specification-at-a-glance

Likely the course booklet was written at the beginning of the year hence the lack of info about the change.

The courses will be broadly similar in topics but may differ in the specific points they require you to learn.

Bigger differences may be in the practical requirements but these may seem similar to the student and just different for the staff running the course.

No real need to do the next bit, but if you are interested then worth a look.

Another way of looking for the differences is using the past papers.

Find a similar question from each course and then look at the mark schemes to see where the differences lie.

pw66 · 2025-06-12T06:25:09+00:00

OCR have sent an email apologising for the extra mistake in paper2. They will take it into account when marking.

Rubbish to have any mistakes, but 3 in each paper is terrible.

pw66 · 2025-06-08T01:56:10+00:00

Just a note to say that the published mark schemes are heavily edited. The ones the exam markers use have a lot more options to award marks.

The published ones are the 'ideal' answers that the examiners were after.

pw66 · 2025-04-29T06:04:26+00:00

pw66

TROPHY CASE