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GCSE Edexcel physics - 12th June 2014

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Reply 40

Akashi

Original post by Eradicating

It was two marks! So do I get a mark for stating it transfers energy?

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You should do as there is a transfer of energy involved.

Reply 41

pphilip99

Original post by Akashi

Nope? Electrons carry charge. When current passes through a resistor the electrons in the charge collide with the ions that make up the resistor. This causes heat energy to be released leading to the resistor heating up - this will get you full marks.

Yay!
That's what I got :smile:

Reply 42

Akira2014

What about that Kilo watt question?
Does 1kw =1000 w?

Reply 43

Akashi

Original post by Akira2014

What about that Kilo watt question?
Does 1kw =1000 w?

I can't remember the question. What was it along the lines of?

1 kW = 1000W.

Reply 44

Eradicating

Original post by Akashi

I can't remember the question. What was it along the lines of?

1 kW = 1000W.

That's right! So it was 1.8Kw this 1800W

What was the question again

I think it was the power = one?

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Reply 45

Eradicating

Original post by Akashi

You should do as there is a transfer of energy involved.

Lool I lost 2 marks already LOL how nice!

And grade boundaries are bound to be high.

What was the half life? Exponential decay graph?

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Reply 46

Akashi

Original post by Eradicating

Lool I lost 2 marks already LOL how nice!

And grade boundaries are bound to be high.

What was the half life? Exponential decay graph?

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Half-life they should accept 5.2-5.4 years I guess.

Reply 47

Eradicating

Original post by Akashi

Half-life they should accept 5.2-5.4 years I guess.

I got 5 as this was the year that half of the undecayed nuclei in a sample decayed.

There was no points (.2,.3).

The x axis was just 2,4,6,8,10 and 5 was the middle of year.

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Reply 48

clareeey

Original post by Eradicating

That's right! So it was 1.8Kw this 1800W

What was the question again

I think it was the power = one?

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I think it was something like what is the total energy transferred if the 1.8Kw kettle was on for 2 minutes so I got 216000, hope that's right already know I've dropped 2 marks... :rolleyes:

Reply 49

Akashi

Original post by clareeey

I think it was something like what is the total energy transferred if the 1.8Kw kettle was on for 2 minutes so I got 216000, hope that's right already know I've dropped 2 marks... :rolleyes:

I got 215800 or something.

Reply 50

Eradicating

Original post by clareeey

I think it was something like what is the total energy transferred if the 1.8Kw kettle was on for 2 minutes so I got 216000, hope that's right already know I've dropped 2 marks... :rolleyes:

It was 216000 :biggrin: