100% Real Waec Gce 2015 Physics Obj And Theory Answers.



Physics OBJ:
1-10: BCBDBCCCCA
11-20: DBBCCCACBD
21-30: CBCDCDADDA
31-40: BACDDBCCDC
41-50: CADCADDBAC


(1a)
Acceleration(a)=change in velocity/time
Velocity=displacement/time
V=L/T
V=LT^-1
a=LT^-2

(1b)
Presssure=force/Area
P=F/A
F=ma=MLT^-2
P=MLT^-2/L^2
=ML*L^-2T^-2
P=ML^-1T^-2

(1c)
Density=M/L^3
=ML^-3

(2)
Initial velocity(u)=42ms^-1
Angle(tita)=30degrees
H=u^2sin^2(tita)/2g
H=42^2*sin^2(30degrees)/2*10
H=42*42*(0.5)^2/20
H=22.05m

(3)
Mercury does not wet glass because the
cohesion
of mercury to glass is greater than adhesion of
water to glass

(4)
Gradient=(30-12)/(F-10)
=(12- 8)/(10-5)
18/(F-10)=4/5
4F-40=90
4F=130
F=130/4
=32.5N

(5a) Tensile stress is the ratio of load or force
(F)
to its cross-sectional area(A). It is measured
in
Nm^-2 or N/m^2.

(5b) Young modulus is the ratio
of tensile or compressive stress to
compressive
strain. It is demoted by E and measured in N/
m^2 or Nm^-2(S.I unit)

(6)
Charge(q)=1.6*10^-19C
Potential difference(v)=1.0*10^5V
Energy(E)=1/2qV
E=1/2*1.6*10^-19*1.0*10^5
E=0.8*10^-14
E=8*10^-15J

(7)
-Electron diffraction
-Compton effect
-Optical spectra

(8a)
(i)Relative motion is the motion of a body say
A
in reference to another body say B
(ii)Velocity of the car
=80km/hr-60km/hr
=20km/hr
(8b)
(i)force is the push or pull on a body and
anything that makes a body to move
(ii)Contact force;push,tension,reaction
Field forces;gravitational force,electrostatic
force,magnetic force

(10a)
-Sound wave is longitudinal while radio wave
is
transverse
-Sound wave is mechanical while radio wave
is
elecromagnetic

(10b)
It is louder because the tension imposed on its
stem

(10c)
(i)
-The two waves must have the same
amplitude
-The two waves must have the same
frequency
(ii)
-They must emanate from different sources
-The must super-imposed
(iii)
-Light must travel from optically densed
medium to less dense medium
-The incidence angle must exceed the critical
angle





Related Article


Posted By quadrihatic On 11:04 Mon, 14 Sep 2015

Comments:0 || Views:

Comment
Name




.....................

Please LOGIN or REGISTER To Gain Full Access To This Article


Wapbaze is an Entertainment website that deals in uploding of music tracks of any kind and letting her users download them in Mp3 formats of high quality. Wapbaze.com is the main website, Wapbaze.com/music/ is the folder for latest songs, wapbaze.com/movies/ is for mp4 movies updates so as wapbaze.com/videos/ is for 3gp music videos updates and wapbaze.com/forum/ is for latest gist, news, health and tech updates.