Note:
* means multiply
^ means raise to power
/ means division
pls check down we have updated No11
PLS USE THIS OBJ
Physics obj.
1-10: ABCADBAABB
11-20: DBDDBDCACD
21-30: ABCACDCDDC
31-40: ACCBBDCBBD
41-50: AADDADDBDA
Completed
2)
given that U=15m3^-1
R=U* sqr2h/g
h=20m
g=10
R=15*sqr2*20/10
R=15*sqr40/10
R=15*sqr4
R=15*2=30m
R=30m
=========================
3 )
i ) Brownian motion
ii ) Atomic size
iii ) Expansion
=========================
5a)
i)force
ii)length
5b)
By increasing the density mosquitoes lavrva than the density of water
=================================
6)
(i)Energy efficient- so far the best light for interior lighting.
(ii)Low production cost (of tubes, not of the ballasts)
(iii)Long life of tubes.
=========================
7 )
i ) It requires low voltage sources for it to function
ii ) It cannot be easily broken
iii ) It is cheaper and quite easy to manufacture
=========================
8b)If their distance and masses are doubled their corresponding force would also be doubled and the work done respectively
I.e.Workdone=Force * distance
Force= Mass * Acceleration
W= Mg * d
|
Increase
8d (i)pushing someone on a swing.
(ii)Tuning a radio to a particular frequency.
=========================
10a) A wave front is an imaginary surface passing through the points of a medium oscillatory in phase
10bi)Prismatic binoculars is used to see round corners
10bii)i) Refractive index of the glass prism
II) The angle of the incident of ray
10bii the refractive index of glass
ii the speed of the righe ray
biii (pls do the drawing
Ci (do the drawing
=========================
12ai)Nuclear fission is a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.
12aii)a)A graphite reactor is a nuclear reactor that uses carbon as a neutron moderator, which allows un-enriched uranium to be used as nuclear fuel.
12aii)b)Boron rods are used in
nuclear reactors to control the fission rate of uranium and plutonium. They are composed of chemical elements such as boron, silver, indium and cadmium that are capable of absorbing many neutrons without themselves fissioning.
12(c)
Liquid sodium serves as coolant in a nuclear fission reactor
=============================================
11a A dielectric is an electrical insulator that can be polorised by an applied electric field.
11aii) GIVEN: A = 9.6 * 10^-3 M^2
d = 2.25 * 10^4
Eo = 8.85 * 10^-12 F/m
Er = 900
C = /
using; C = EoErA/d
capacity, C = 8.85*10^-12 * 900 * 9.6*10^-3/2.25 * 106-4
C = 33984 * 10^-11
C = 3.3984 8 10^7 F
C =0.344F
11bi) A voltmeter has a higher resistance because it is designed to limit the flow of current to practically zero to avoid voltage drop or less across it.
11bii) combined resistance Rt
Rt = (400 * 400/400 + 400) + (800 * 800/800+ 800)
Rt = 200 + 400
Rt = 600ohms
current supplied by battery = r/Rt
= 6/600
= 0.01A
voltage drop across the resistance = 200 * 0.01
=2V
therefore the voltage reading is 6 -2
= 4V
11c) Equivalent resistance is:
Rt = 2+2+(2*2/2+2)
Rt = 4+1
Rt = 5ohms
* means multiply
^ means raise to power
/ means division
pls check down we have updated No11
PLS USE THIS OBJ
Physics obj.
1-10: ABCADBAABB
11-20: DBDDBDCACD
21-30: ABCACDCDDC
31-40: ACCBBDCBBD
41-50: AADDADDBDA
Completed
2)
given that U=15m3^-1
R=U* sqr2h/g
h=20m
g=10
R=15*sqr2*20/10
R=15*sqr40/10
R=15*sqr4
R=15*2=30m
R=30m
=========================
3 )
i ) Brownian motion
ii ) Atomic size
iii ) Expansion
=========================
5a)
i)force
ii)length
5b)
By increasing the density mosquitoes lavrva than the density of water
=================================
6)
(i)Energy efficient- so far the best light for interior lighting.
(ii)Low production cost (of tubes, not of the ballasts)
(iii)Long life of tubes.
=========================
7 )
i ) It requires low voltage sources for it to function
ii ) It cannot be easily broken
iii ) It is cheaper and quite easy to manufacture
=========================
8b)If their distance and masses are doubled their corresponding force would also be doubled and the work done respectively
I.e.Workdone=Force * distance
Force= Mass * Acceleration
W= Mg * d
|
Increase
8d (i)pushing someone on a swing.
(ii)Tuning a radio to a particular frequency.
=========================
10a) A wave front is an imaginary surface passing through the points of a medium oscillatory in phase
10bi)Prismatic binoculars is used to see round corners
10bii)i) Refractive index of the glass prism
II) The angle of the incident of ray
10bii the refractive index of glass
ii the speed of the righe ray
biii (pls do the drawing
Ci (do the drawing
=========================
12ai)Nuclear fission is a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.
12aii)a)A graphite reactor is a nuclear reactor that uses carbon as a neutron moderator, which allows un-enriched uranium to be used as nuclear fuel.
12aii)b)Boron rods are used in
nuclear reactors to control the fission rate of uranium and plutonium. They are composed of chemical elements such as boron, silver, indium and cadmium that are capable of absorbing many neutrons without themselves fissioning.
12(c)
Liquid sodium serves as coolant in a nuclear fission reactor
=============================================
11a A dielectric is an electrical insulator that can be polorised by an applied electric field.
11aii) GIVEN: A = 9.6 * 10^-3 M^2
d = 2.25 * 10^4
Eo = 8.85 * 10^-12 F/m
Er = 900
C = /
using; C = EoErA/d
capacity, C = 8.85*10^-12 * 900 * 9.6*10^-3/2.25 * 106-4
C = 33984 * 10^-11
C = 3.3984 8 10^7 F
C =0.344F
11bi) A voltmeter has a higher resistance because it is designed to limit the flow of current to practically zero to avoid voltage drop or less across it.
11bii) combined resistance Rt
Rt = (400 * 400/400 + 400) + (800 * 800/800+ 800)
Rt = 200 + 400
Rt = 600ohms
current supplied by battery = r/Rt
= 6/600
= 0.01A
voltage drop across the resistance = 200 * 0.01
=2V
therefore the voltage reading is 6 -2
= 4V
11c) Equivalent resistance is:
Rt = 2+2+(2*2/2+2)
Rt = 4+1
Rt = 5ohms
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