Tuesday 7thPHYSICS PRACTICAL 10:00am-12:45pm

(1a)
Lo=125.00cm^3
Diameter of measuring cylinder=3.21cm^3

DRAW A TABLE WITH THE VALUES BELOW:

S/N: 1,2,3,4,5
m(g): 50.0,100.0,150.0,200.0,250.0
Lo(cm^3): 125.0,125.0,125.0,125.0,125.0
L(cm^3): 135.0,145.0,165.0,185.0,205.0
y=L-Lo(cm^3):10.0,20.0,40.0,60.0,80.0
V=0.785d^2y: 80.89,161.77,323.55,485.32,647.10

(1aviii)
Slope=(250.0-150.0)/(647.10-323.55)
=100.0/323.55
=0.309

(1aix)
-i avoided error due to parallax
-i ensure that the mass is gently dropped into the liquid

(1b)
Archimedes principle states that when a body is immersed completely or partially in a liquid (water) it experience an upthrust which is equal to the weight of d liquid displaced by it.

(1bii)
vol of the wood = 2.0*10^-5m³
mass=5.0*10^-³
g=10.0ms^-²
Density of water=1.0*10³kgm^-³
Vol of object = mass/density
Density =mass/volume
Density of the object =mass of the object /volume
5.0*10^-³/2.0*10^-5
=2.5*10²kgm³
Upthrust= vol of object density of liquid g
2.0*10^-5*1.5*10²*10
=0.3N

==========================
(3a)
i:1,2,3,4,5
R(n):2.00,4.00,6.00,8.00,10.00
I(A):3.00,2.25,2.00,1.88,1.80
R^-1:0.50,0.25,0.17,0.13,0.10

Precaution:
-I ensured clean terminals
-I avoided zero error on the ammeter used
-I tightened all the wires together

(3b)
Ohm’s law states that current passing through a metallic conductor is directly proportional to the potential difference between its end,provided that temperature and its other physical condition remain constant

(3bii)
E&L
E=kL
E/L=k
E1/L1=E2/L2
l2=E2L1/E1=(1.5 *1)/2.5
L2=0.6cm
the new balance point when 1.5v cell is connected across it is 0.6cm