==>
Advertisements
Friday, 28th August 2020
Physics 2 (Essay) 9:30 am – 11 am
Physics 1 (Objective) 11:00am – 12:15pm
====================
Advertisements
KEEP REFRESHING THIS PAGE
====================
====================
2020 WAEC Physics Theory/OBJ/Essay Questions and Answers
PHYSICS OBJ:
1-10: DCCAACDCCC
11-20: BDACABDCCB
21-30: ACBACCCBAD
31-40: BDDBAACCCA
41-50: CAAABBCBBC
loading…
=====================
PLEASE NOTE: asteric(*) MEANS multiplication(x).
(1)
Original length Lo = 3m
Extension e = 310 = 3*3 = 9m
F×e
F = ke where k = 982.3NM-²
F = 982.3*9 = 8,840.7N
The five that produce the extension F = 8.840.7N
Advertisements
====================
(2a)
Metal flat plate: It is a collector of heat that converts the radiant solar energy from the sun into heat energy by the process of greenhouse effect.
(2b)
Thermal Insulator: It prevents loss of accumulated heat in the solar collector and thereby improves its absorption efficiency.
(2c)
Tubes: They are use to capture almost all the sun’s energy. It is the most effecient solar collector
====================
Advertisements
(4)
V∝ Tx μy
LT-∝(MLT-²)x(MLT-¹)y
LT-¹∝ m*L*T-²x x m y L-y
LT-¹∝ m(x+y)L(x-y)T-²x
Comparing
X-y=1
X+y=0
-2x=1
From equation 3
X=½
Putting x = ½ into (eq) 2
y=-½
Equation is
V∝ T½ μ-½
V∝ √T/μ
V= k√T/μ
Where k is constant
CLICK HERE FOR THE IMAGE
=======================
(5)
CLICK HERE FOR THE IMAGE
====================
(6)
Angle at horizontal θ = 30°
Time of light , T = 25sec
Velocity of projection u = ?
But T=2using sinθ/g
25= 2u*sin30/10
25=0.5u/5
0.5u=125
U=125/0.5
=250ms-¹
CLICK HERE FOR THE IMAGE
=====================
(8a)
A torque or moment of a couple is the product of one of the forces and the perpendicular distance between the lines of action of the two forces.
(8aii)
(i)The two forces must be equal
(ii)The two forces must be opposite parallel
(iii)They must be equal distance between them
(8bi)
Free fall is defined as the motion of the body where gravity is the only force acting upon it.
(8bii)
Height of tower H = 40.0m
Velocity v = 10.0m/s, time t= ? , g=10.0m/s
Using the relation
S= ut + 1/2gt^2
H= ut + 1/2gt^2
40= 10t + 1/2*10t^2
4= t + t^2/2
= t^2 + 2t – 8=0 ( solving quadratically)
= (t+4)(t-2)=0
t+4=0 or t-2=0
t= -4 or t=2
Therefore time to fall on the ground t=2s
(8c)
CLICK HERE FOR THE IMAGE
==========================
(9)
CLICK HERE FOR THE IMAGE
CLICK HERE FOR THE IMAGE
=======================
COMPLETED!!! .
Waec Cosmetology 2021 Answers for 20th August 2021
Waec IRS Answers 2022 – 8th June 2022
2020 Waec Biology Practical Questions And Answers 31st August 2020
About Author
Bilal Sani
Bilal Sani is a passionate educator and a seasoned exam expert who has helped thousands of students achieve their academic goals. He has a wealth of experience and knowledge in various subjects and exam formats, such as WAEC, NECO, JAMB, NABTEB, GCE and others. He is dedicated to providing quality and reliable exam resources and guidance for students who want to excel in their exams. He also updates his website regularly with the latest exam news, syllabus, timetable and past questions. Expobite is the ultimate exam solution website for Nigerian students.
Thanks for ur concerned, I really appreciate your efforts
Thanks Expo bit
am not a waec candidate..i only registered neco..but i can see u guys are doing alot of work..thanks alot!
u people are doing well gratitude to u all