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*2017 PHYSICS QUESTIONS/ ANSWERS NOW AVAILABLE!!!*

By | On April 8, 2017 (6 months ago)
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Physics-Obj
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SECTION A ANS 5QUESTION
================================
1)
decrease in height (h)
increase in time (t)
this shows that distance changes with
time
==================================
3)
i)Brownian motion
ii)Atomic size
iii)Expansion
================================
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
=============================
4)
L1=14cm F1=4N,F2=6N
L2=4cm, Lo=?
Using hooke’s law
4/14-Lo*6/4-Lo
4(4-Lo)=6(14-Lo)
16-4Lo=64-6Lo
-4Lo+6Lo=64-16
2Lo=48
Lo=48/2
Lo=24Cm
=============================
5a)
i)force
ii)length
5b)
by increasing the density mosquitoes
lavrva than the density of water
=================================
6)
A)Energy efficient- so far the best light
for interior lighting
B)Low production cost (of tubes, not
of the ballasts)
C)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
8c)
-Acceleration due to gravity
– At maximum height, final velocity is
zero
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
============
SECTION B ANS 3 QUESION
================================
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.

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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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posted by KVNG_KHALIFAH { MALO }

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