Estimating Physical Quantities - A Level Physics

As you develop your Physics you will be able to recall and recognise the size of common objects - although you don't have to remember the exact number you do need to be close enough to the correct order of magnitude.

Thanks for watching,

Lewis

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[harrisont]

Such a random part of the specification - realistically you’d use mass balances or measuring devices, I never get questions that ask you to estimate this stuff 😂

[husnainhamid]

Okay! I started my A levels recently and what the actual frick. ESTIMATES!! How am I supposed to know the mass of a wooden meter rule.
FML!

[AJ-ssjy]

Hi Mr Matheson. The last example where you estimated the surface area of the earth is not coherent with your earlier examples. The order of magnitude for 6400km should be 7 and not 6. I hope you agree with me. If you do agree with me, perhaps you should make a comment for this video so that students don’t get confused. Thanks for your cool videos.

[avneetgulati]

Hey, I don't understand the last part. Why does 6400km round to 10^6m? Surely 6400km is approximatley equal to 10 000km = 10^4 km which is = 10^4 * 10^3 = 10^7 m. Sorry if I'm being really stupid.

[Riiisuu]

80kg is in the 10^2kg order?
But 1500kg is in the 10^3kg order? So what is 600kg's order...?

[sansamman]

at 2:18 I was like:
yah, 4(PI) r sq.. ow yah cubed!
lel

[tomaslopes]

Hi! Can you tell me why is the resistance in a voltmeter infinite and the resistance in a ammeter 0?