[WAEC CHOCK] Waec Physics Practical Answers Now

 
PLEASE NOTE THE SYMBOL CLASS FOR PHYSICS AS STATED BELLOW
(1) / means division or divide
Examples:
2/2 means 2/2
2 whole no 3/4 means 2¾
M=wp+(1/3)yp^2 means m=wp + ¾y²
(2) Log means logarithm
Example: (8) Log5 (base 8) means Log₈5
(3) * means multiplication
Example: 2*2 means 2×2
(4) ^ means Raise to power
Examples:
3^(-1) means 3^-1
5^(2) means 5²
30cm^(-2) means 30cm^-2
(5) Tita means θ
Example: Tan tita means tan θ
(6) Pie means π
Example: Pie R sqr h means πr²h
(7) Base means subscript
Example: 2 Base 3 means A₃
(8) Sqr root means √
Examples:
√3-√6+2√3 means Root 3-root6+2root 3
√(¾) means sqr root(3/4)
(9) bar means a dash on top a number of letter
Example: X bar means x̅
(10) —(1) means equation 1
(11) Proportional means ∝
Example: R is proportional to 3/4rut m means R ∝ ¾
(12) Alpha means α
(13) Beta means β
(14) Gamma means γ
(15) cube root means ∛
(16) Mu means μ
(17) Rho means ρ
(18) Delta means δ
(19) Sigma means σ
(20) Tau means τ
(21) Ohm means Ω
(22) Lamda means λ
(23) Omega means ω
(24) Intersection means ∩
Example: B intersection C means B∩C
(25) Union means U
Example: B union C means BUC
(26) Factorial means !
(27) complements in sets means ‘
(28) (aq),(g),(l),(s) is used in chemistry to show the state of matter in equations
(29) Equivalent to means ≡
(30) Not equal to means ≠
(31) Quotation means “ ”
(32) Less or equal to means ≤
(33) Greater or equal to ≥
Example: (3/4)>=(1/2) means ¾ ≥ ½
(34) Plus or minus (or +-) means ±
Example: (3/4)<=(1/2) means ¾ ≤ ½
(35) Element of means ∈
Example: 2 belongs to X or 2 is a member of X means 2∈X
(36) Percent or percentage means %
(37) Degrees Fahrenheit means ℉
(38) Degrees Celsius means ℃
(39) Universal set means ξ or U
(40) Null or empty set means ∅ or {}
(41) <RST means RŜT
(42) 2.S.F means 2 significant figures
(43) P=(2,3) means P={2,3} in sets
(44) Propotional to means ∝
(45) Therefore means ∴
(46) KNO(3)(s) means KNO₃(s)
(47) NaCl=> Na^(+) + Cl^(-) means NaCl → Na⁺+ Cl^-
(48) Summation means Ʃ
(49) Parallel lines means ǁ
(50) Perpendicular lines means ˩
(51) Reversible equation means ↔
(52) Infinity means ∞
(53) Approximately means ~
(57) Approximately equal to ≅
Other Symbols
(1) File means ɸ
(2) Δ means Change or Triangle
(3) slope or differentiation means dy/dx or ∂y/∂x or δy/δx or Δy/Δx
(4) Parenthesis means …
(5) Naira means ₦
(6) Integral means ∫
(7) Almost equal to means ≈
(8) For all means ∀
(9) There exist means ∃
(10) Epsilon means ε
(11) Vertical dots means ⁞

SEE ANSWER BELLOW(1Vii)
Draw a table
TABULATE
S/N: 1 , 2 , 3 , 4 , 5
D/cm: 140 , 120 , 100 , 80 , 62
T/s: 1.25 , 1.10 , 0.93 , 0.83 , 0.72
W/ms-1: 1.12 , 1.10 , 1.08 , 0.96 ,0.83
V(ms-1): 224 , 220 , 216 , 193 , 167
(1ix)
Slope = (Y2-Y1)/ (X2-X1)
ms/S = (216 -167 ) / (0.93 -0.72)
ms/S = 49/0.21 = 233.3
(x) It determines the ratio of the distance moved by effort to the distance moved by load
1xi.
1. I ensured that the sphere does not slip off from the inclined plane.
2. i ensured that the whole set-up is conneted correctly in order to minimize errors.
1bi) VR= 1/sinx
vr- velocity ratio, x=angle of inclined plane
bii) F = macos
5*10*cos30= 43
(1bi)
Velocity Ratio(V.R) = i/ sin(tita) = 1/(h/d)
V.R = D/h
h= height of inclinde plane
(1bii)
mass of object(m)= 5kg
Angle of inclination(tita)= 30degree
Force(F) Perpendicular to the plane is
F= mg Sin(tita)
F= 5*10*Sin30(degree)
F= 25N
(3)
3vi. X(cm)-20, 35, 45, 60, 80
I(A)- 0.5/ 0.55/ 0.62/ 0.67/ 0.73
X-1(cm-1)0.05/ 0.029/ 0.022/ 0.017/0.013
(viii) slope= change in Y/change in X
=(0.029-0.017)/(0.67-0.55)
=0.012/0.12
0.1
ix)x-1= 0.83A
x) Io/I= 0.83/0.5 = 1.66
b. Y= (75*1.018)/50
=1.527V
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NOTE: ^ means raise to power.
i: means that under i, u will get 1,2,3,4,5..
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3xi.
1. i ensured that the key is not closed when no reading are not taken.
2. i ensured the circuit parameters are tightly connected to ensure accurate result.
3. i ensured that the jockey touches the exact point on the potentiometer wire.
3bi.
Emf of a battery is the potential difference between the terminals of a cell when no current flows in the circult.
3bii.
(3bii)
Given,
Vx=1.018V
Lx= 50.0cm
Vy=?
Ly=75.0cm
Vx/Lx = Vy/Ly
1.018/50 = Vy/75
Vy= (1.018 * 75)/50
Vy= 1.527V