Is the mark scheme wrong?

This is a screenshot of the edexcel physics specimen 8PH0/01 for the new syllabus. It is question 13 (a) and I did the same calculation as they show but I get 1.34*10^-6 instead of 1.34*10^-8 like they say it is. I resetted my calculator and used google calculator but still got the same answer so are they wrong?

Reply 1

Kyx

6

Original post by grepole121

This is a screenshot of the edexcel physics specimen 8PH0/01 for the new syllabus. It is question 13 (a) and I did the same calculation as they show but I get 1.34*10^-6 instead of 1.34*10^-8 like they say it is. I resetted my calculator and used google calculator but still got the same answer so are they wrong?

mark scheme must be wrong. I got x10^-6 too :wink:

Reply 2

Vikingninja

21

Could you post a SS of the question.

Reply 3

crashMATHS

16

Original post by grepole121

This is a screenshot of the edexcel physics specimen 8PH0/01 for the new syllabus. It is question 13 (a) and I did the same calculation as they show but I get 1.34*10^-6 instead of 1.34*10^-8 like they say it is. I resetted my calculator and used google calculator but still got the same answer so are they wrong?

I am guessing you squared your radius and then converted by x10^-3, rather than squaring your radius once you've converted it.

But I haven't computed it, so I don't who is right. You're just that much of a factor out.
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Reply 4

username1456327

OP

Original post by Vikingninja

Could you post a SS of the question.

Reply 5

Kyx

6

Original post by kingaaran

I am guessing you squared your radius and then converted by x10^-3, rather than squaring your radius once you've converted it.

But I haven't computed it, so I don't who is right. You're just that much of a factor out.
Posted from TSR Mobile

I converted it before squaring, and still got x10^-6