PLS TAKE NOTE OF THESE SYMBOLS:
@Means Tita sign whch looks like
crossed-zero.
^Means Raise to power .
*Means Multiply
Degree looks like a small zero. (2.) R=(U^2sin2@)/g
78=(30*30 sin2@)/10
0.8667=sin2@
2@=60
@=30 (4.) young modulus=stress/strain stress=F/A=35000/4=8750 strain=e/l=0.025/50=0.0005 young
modulus=8750/0.0005=17500000 (7a)
The minimum energy of the incident
ray of the light must be equal to the
work function of the material or
above the work function of the metal. (7b)(i) polarization.
(ii) diffraction. (8a)
(i) Rotational Motion
I.The movement of the blades of a fan.
II.The motion of the wheel of a car. (ii) Linear Motion
I.The motion of a boy from a point to
another point on a straight line.
II.The motion of a ball on a straight
course. (8b.)
AIM: To determine the density of an
irregularly shaped solid
APPARATUS: An irregularly shaped
solid, a beam balance,a measuring
cylinder,a price of thread PROCEDURE: Place the irregularly
shaped solid on the beam balance
and measured its mass as mkg and
place the solid in the measuring
cylinder that contains water up to say
xm^3 with the aid of the thread.Record the new volume of
ym^3. (9)(a)
Heat capacity is the quantity of heat
required to change the temperature of
a substance by 1 k or 1degree Celsius (9b) I. It changes the phase (9d) Given,
mass of pepper soup, m=800g
=0.800kg
Initial temprature of pepper soup,
tita =30degree C
Power of the microwave oven, P=1200w
Time taken, t =3minutes =3*60s
=180s.
Specific heat capacity of pepper soup,
c=4000j/kg k. (9di)final temperature of the pepper
soup,
@2=? ,
Heat given by d microwave oven=
Heat absorbed by d pepper soup.
Pt= mc(@2 - @1), 1200 * 180= 0.8 * 4000(@2 - 30),
216000= 3200(@2 - 30),
@2 - 30=67.5 ,
@2 = (67.5 + 30)degrees ,
@2 = 97.5degree Celsius NOTE THAT: @ Means tita sign (9Dii) containers with tight-fitting lids
are not suitable for use in microwave
cooking because there must be room
for expansion which can only be
catered for if the lids are not tight-
fitted (9diii) there is dent on the container
because the final temperature was so
large compared to the material used in
making the container,I.e plastic.and
plastics are not very good for such
heat.The cooling of the plastic cannot be uniform. MORE LOADING...
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Description : PLS TAKE NOTE OF THESE SYMBOLS: @Means Tita sign whch looks like crossed-zero. ^Means Raise to power . *Means Multiply Degree looks like a ...
