2024 NECO PHYSICS: (7930)

Completed

________________________

Bonuses

(2)

L = 10.00cm

[TABULATE]

S/N: 1 || 2 || 3 || 4 || 5

β°: 70.00 || 60.00 || 50.00 || 40.00 || 50.00 || 60.00

α°: 20.00 || 30.00 || 40.00 || 50.00 || 60.00

Sinα=Q : 0.34 || 0.50 || 0.64 || 0.77 || 0.87

Z/cm: 1.70 || 2.50 || 3.20 || 3.80 || 4.30

_________________

(2xv)

GRAPH

(2xvi)

Slope (S) = ΔZ/ΔQ

S = 2.95/0.6

S = 4.92cm

(2xvii)

K = 2S

K = 2 x 4.92

K = 9.84cm

(2xviii)

(i) I ensured the pins were vertically upright

(ii) I avoided parallax error in reading the protractor

(2bi)

[TABULATE]

=PLANE SURFACE=

(i) Image distance is samw with the object distance

(ii) Magnification is always equal to one

=CURVED SURFACE=

(i) Image and object distance varies

(ii) Magnification varies

(2bii)

Number of images = (360/θ) - 1

= (360/40) - 1

= 8 images

_________________________

(1)

(No1 graph) 

(1xiv)

Precautions

(i) I ensured that I avoided error due to parallax while reading the metre rule

(ii) I ensured that the load does not oscillate before taking reading

(1bi)

The ratio of mass of paraffin to volume of water is 900g/cm³ and the ratio of density of paraffin to density of water is 0.9

(1bii)

Weight in Air = 2.9N

Weight in water= 1.3N

Relative Density= ?

Relative Density = Weight in Air/ Change in weight of water

R.D = 2.9/(2.9 - 1.3)

= 2.9/1.6 = 1.8125

Relative Density = 1.813

__________________________

(3)

Scale of graph:

Y - 2cm rep 0.2 unit

Y - 2cm rep 0.1 unit

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