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67 Admirable ## About IB Smacher Glau

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IB therefore IBS

## Profile Information

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Male
• Exams
May 2012
• Country
United Arab Emirates

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1. Question : a) Ionized hydrogen atoms are accelerated from rest in the vacuum between two vertical parallel conducting plates . the potential differnce between the plates is V as a result of accelertation each ion gain energy of 1.9*10^-18 J find the value of V ) b) the plates in (a) are replaced by a cell that has an emf of 12 V and internal resistance 5 ohms . A resistor R is connected in series with the cell . The energy transferred by the cell to an electron as it moves through the resistor is 1.44*10^-18 J Show that the value of R is 15.0 Ohms . I Know how to find a but how can it show
2. 2012 HL BOUNDARIES http://www.mediafire...gkxhvu223unmgw9 Do you Guys think Nov 2012 will have similar boundaries?
3. Predicted Question : Why the Transformer frequency must be constant ?
4. http://www.mediafire.com/view/?7rubrubbznuc9l5 How can this Question be solved without using GDC ?
5. http://www.mediafire...qeziqar8k98dlk0 This Question .. Now why the answer is B ? be shoudn't it be C in which induced emf ? Also if they ask for the induced current will the answer be Q to S ?
6. http://www.mediafire.com/view/?ejo31ciq71b0d2o How can I solve CII)
7. Q) Radioactive element P has a half-life of 30 days and element Q has a half-life of 20 days. Initially a radioactive source contains equal numbers of each element. What is the ratio ( number of atoms of P / number of atoms of Q) after 60 days have elapsed? A. 1/2 B. 2/3 C. 3/2 D. 2 Why the answer D ? shouldn't it be B ?
8. A proton and an alpha particle have the same de Broglie wavelength. Which of the following is approximately the ratio ( Speed of alpa particle divided by Speed of proton ) a) 1/4 b) 1/2 c)2 d) 4 ?
9. Can you clarify to which questions of which part of the paper you are referring? This question is about gravitational fields and potential part b ) A binary star system consists of two stars with masses M1 and M2 rotating about a common centre. The centres of the two stars are separated by a distance R = 1.2 × 1010 m. bii) (ii) determine the distance x at which the gravitational field strength due to the two stars is zero.
10. M091.H2.B3B bii) and biii) ??
11. M112.H2.B1B This question about orbital motion part (b) (bi) Total energy isn't it = -Gmm/2r how do they found it using -Vm/2 ?
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