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Monday, 10 April 2017

Waec 2017 PHYSICS Essay and Obj, Theory and Objectives Answers and Questions, Expo, Runz, Runs, Free

Pls dont just write, cross check your question, i need your commentbif you want the full.

3)
i)Brownian motion
ii)Atomic size
iii)Expansion
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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
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5a)
i)force
ii)length
5b)
by increasing the density mosquitoes lavrva than the density of water
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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
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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 graphite reactor is a nuclear reactor that uses carbon as a neutron moderator, which allows un-enriched uranium to be used as nuclear fuel.
12aiii)
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.
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