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686
An object R leaves a platform XY with a horizontal velocity of 7m
-1
and lands at Q. lf it takes the same object 0.3s to fall freely from Y to P, calculate the distance PQ.(Take g = 1Oms
2
)
A.
7.30m
B.
2.55m
C.
2.10m
D.
1.65m
E.
0.45m.
View Answer & Discuss (4)
WAEC 1990
687
A simple pendulum makes 50 oscillations in one minute. What is its period of oscillation?
A.
0.02s
B.
0.20s
C.
0.83s
D.
1.20s
E.
50.00s
View Answer & Discuss (11)
WAEC 1990
688
The body P shown in the diagram above is in equilibrium. If the mass Q of the body is 10kg, calculate the tension T in the string. (Take g = 10ms
2
)
A.
20/√3N
B.
20N
C.
50N
D.
200√3N
E.
200N
View Answer & Discuss (6)
WAEC 1990
689
An object weighs 10.0 N in air and 7.0 N in water. What is its weight when immersed in a liquid of relative density 1.5?
A.
4.50N
B.
4.67N
C.
5.50N
D.
6.67N
E.
8.50N
View Answer & Discuss (5)
WAEC 1990
690
The absolute zero temperature is defined as the temperature at which
A.
thermal motion ceases
B.
the temperature of a gas is 273
o
C
C.
ice melts
D.
the volume of a real gas is maximum
E.
the pressure of a real gas is maximum
View Answer & Discuss
WAEC 1990
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