For Caribbean physics students doing Caribbean Advanced Proficiency Examinations
CAPE Physics 2017 U2 P2
CXC CSEC Physics 2017 June P2
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P2
Sumber : Modul Melaka Gemilang SPM Manfaatkan sebaik2nya Bahan2 SPM 2014 untuk membantu peningkatan optimum pencapaian calon dalam peperiksaan SPM 2014 Selamat berjaya calon SPM 2014Full description
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Cinética - Práctica 2.
FORM TP 22 22138
SECOND SECON DARY EDUCA EDUCATIO TION N CER CERTIF TIFICA ICATE TE EXAMINA TI T ION
1 1 hours
1.
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2.
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You are to spend no more than 1 hour on this question. A liquid, A, initially at temperature T J 28.4°C, is heated by an immersion heater in a container . The resulting temperature, T2 , is recorded at 1 minute intervals arid the following results obtained . =
Time,
0
t / min.
Temperature
T2 tC
Temperature
changes D..Tt C
Cd)
28.4
I
36.0
2
3
43.1 525
4
5
6
7
60.5
69.0
75.1
84.3
0
Cp the Specific Heat Capacity of the liquid is related to the slope S by: Cp
=
20s00 J kg-I K-I. Find the Specific Heat Capacity of the liquid.
(f)
Another liquid, B, has a much higher specific heat capacity than Liquid A. On the same graph paper used in (b) on page 3 sketch (DO NOT PLOT) a line showing the approximate graph that would be obtained if Liquid B was the working fluid. (2 marks)
(g)
State TWO possible sources of error in this experiment and in EACH case describe a method that might be used to minimize the magnitude of the error.
A bloek of wood measures 2 em x 4 em x 9 em. Calculate its volume in 51 units.
(ii)
Use Archimedes Principle to explain why some objects float while others sink in the same liquid.
(iii)
Explain how it is possible to predict whether a given object will float or sink in a given liquid.
Two such coils are connected together in the cir cuit of a hair dr yer by means of switches as shown in Figure 1.
This dryer has two power settings LOW and HIGH. A setting is selected by opening or closing the switches. The table below shows the correspondence between power setting and the states of the switches. POWER SETTING SI
S2
LOW
OPEN
CLOSED
mGH
CLOSED
OPE N
S3
OPEN CLOSED
Draw the equivalent circuit for EACH setting by r ed rawing the circuit without the switches. In your equivalent circuit, o pen switches are to be left out entirely and closed switches are to be replaced by an unbr oken line.
(e)
Write down TWO characteristics of a fuse suitable for use in a circuit such as that of the hair dryer .
(f)
Draw a simple sketch showing how a fuse should be connected in a circuit to protect a load. In addition to the fuse and load your circuit should include: live and neutral wires, and an on/off switch.
A container is filled with a liquid of density p as shown in Figure 2. Express the pressure difference between P b - Pain terms of p and the height h.
The apparatus shown in Figure 3 may be used to determine the d ensity of an unknown liquid X. The tu be has a unif or m cross-section and the height of the water column is twice that of liquid X. A and B ar e at the same horizontal level. The pressure dif fe r e nce between points A and C is 2.5 x 103 Pa.
(ii)
Express P B - P D in terms of P A and Pc. [Hint: the answer can be ded uced without r e sorting to any further calculation.]
(ii)
Carbon -14 is often referred to as an isotope of carbon. Explain what is meant by the term 'isotope'.
(c)
A radioacti v~ tracer has a half-life of 18hours. Calculate the fraction of the initial activity remaining af ter 90 hours.
(d )
In a rad ioactive process the element decays to Radon (Rn) and Helium 2~~Ra --.
8~Rn
+
iHe.
Radium (Ra) emits gamma radiation and (He). The equation of this process is
