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Test 4 for level 1,2 & 3 Marking Guidelines NSC Vhembe West District/2023




VHEMBE WEST DISTRICT



NATIONAL
SENIOR CERTIFICATE



GRADE 12


PHYSICAL SCIENCES
TEST 4 FOR LEVEL 1,2 & 3
MARKING GUIDELINES
23/08/2023




MARKS: 100



This marking guidelines consists of 5 pages.




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, Test 4 for level 1,2 & 3 Marking Guidelines NSC Vhembe West District/2023


QUESTION 1


1.1 D  (2)
1.2 D  (2)
1.3 D  (2)
1.4 A  (2)
1.5 A  (2)
1.6 B  (2)
1.7 B  (2)
1.8 B  (2)
1.9 A  (2)
1.10 D  (2)
[20]


QUESTION 2


2.1.1 Frequency – number of cycles/vibrations per unit time  (2)
2.1.2 The time taken for one complete cycle of vibrations or oscillation.  (2)
2.1.3 The apparent change in frequency (or pitch) of the sound detected by a
listener because the sound source and the listemer have different
velocities relative to the medium of sound propagation.  (2)
2.1.4 Frequency is inversely proportional to wavelngth  (2)
2.1.5


340+0
FL = ( ) 1000 
340−20

FL = 1 062,5 Hz  (4)


2.1.6

340+0
FL = ( ) 1000 
340+20

FL = 944,44 Hz  (4)

2.1.7 As the fire engine approaches you, the pitch of the siren is higher 
and as the fire engine moves away, the pitch of the siren
decreases/becomes lower.  (2)



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