Advanced level 2023 northwest regional mock physics 2

Advanced level 2023 northwest regional mock physics 2

Advanced level 2023 northwest regional mock physics 2

4 (a)The isotope Sodium-24 is radioactive. A sampleofa solution cor’ta’r^Tc^dium-24 is to be used to estimate
the volume of blood in a patient. The half-life of the isotope is ^The initial activity of the isotope is
200 Bq when it was injected into theblood stream ofthe patient. ^ hours, 1-0 cm’ ofthe patient sblood
(b) State had an theactivity observations of 8.3 from x 10~Rutherford 3 Bq.Estimate ’s alpha the-particle volumescattering ofbloodjn ’ Datjent -ment.and the corresponding
Answerconclusions EITHER5that (a),(wbere ) and drawn (c)OR about 6(the d),atom (e)and from (f>-each ofthem m^_———
5. (a)i)Statetheassumptions ofthe kinetic theory for anideal gas. (4marks)
ii)Usethe assumptions to derive an expression forthe pressure, J an jdea!gas 0fdensity, p,onthe
walls of its containerifthe mean square speed ofthe molecules is
(b) Eightgasmoleculeshave the following speedsi
square and the root mean square speeds ofthe molecules.
(c) (i)StateKirchhoffscircuit laws,
(7marksl
-I.
:20
m ms ,20,40,50,60,70,,80,90.Calculate the mean
(3marks)
1.0 V (4 marks)
(ii) , 1.0
6\ \ Y
– f V^ 4.0 Q Figurei
‘.\ tf TiUi
IT 2.0 V,0.50 ii-V .’-i •
Calculate the potential difference across the 4.0 Q resistor in figure |.
terminals of the 1.0 V cell higher than its electromotive force?°
OR 6(d),(e)and(f).
6. (d).(i)State the experimental results ofthe photoelectric effect.
(ii)Use Einstein’s photoelectric equation to explain each ofthe
(e) A composite bar is made ofmaterialsX and Y
,25.0 cm and75.0 cmi
temperature atmospheric sectional area is pressure .60 The °Cends . respectively X and Y.are Calculate placed in the contact ratio of with the water thermal at conductivity 100n°r1S?°respective d pilre of Yme to|,ythat t”°igfof the iceXsame atifstandard thecross junction