2000
A piece of stone weights 180 N in air and 150 N in a beaker containing 160 N of methylated spirit. What is the up thrust exerted on the stone?
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2000 NECO SSCE Physics Past Questions
2000
When a metal is heated to a high temperature, electrons are emitted from its surface. The process is known as
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2000
The helium isotope \(^3_2He\)
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2000
A particle of charge q and mass m moving with a velocity v enters a uniform magnetic field B in the direction of the field. The force on the particle is
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2000
When a lever is in equilibrium, under the action of two or more forces, the algebraic sum of the moments of the forces about the point of support is
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2000
A gas occupies a certain volume at 27°C. At what temperature will its pressure remains constant?
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2000
When electrical power is transmitted over long distances, the voltage is stepped up so that
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2000
Which of the following is used in a nuclear reactor to slow down fast moving neutrons?
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2000
The heat from a fire in a closed room reaches someone far away in the room, mainly by
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2000
400g of cold water is added to 200g of water at 70°C. If they are properly mixed and the temperature of the mixture is 300°C. calculate the initial temperature of the cold water. (Neglect the heat absorbed by the contain…
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2000
An element of nuclear number A and proton number Z emits an alpha particle from its nucleus. The nucleon number and the proton number of the new element formed are respectively
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2000
The specific heat of a substance in the solid state is C1; its specific beat in the liquid state is C2 and its latent heat of fusion is L. If a mass M of the substance is changed from the solid state at temperature T, to…
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2000
In a simple pendulum experiment, a boy observed that the times for 30 oscillations are 70.0s, 72.0s and 67.0s respectively. Calculate the mean period of oscillation of the pendulum.
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2000
Which of the following is NOT part of an a.c generator?
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2000
Two forces forming a couple are separated by a distance of 25cm. If one of the forces equals 40N, what is the moment of the couple?
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2000
A solid weights 5.0 N in air, 4.2 N in water and 4.4 N in liquid Y. Calculate the relative density of liquid Y.
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2000
A man at the back of a crowd watches a parade by holding a plane mirror just above his head. The parade passes 6 metres behinde his head and the mirror is 0.25m in front of the man. How far does the image in the mirror a…
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2000
The unit of inductance is
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2000
A wave travels a distance of 20 cm in 3s. The distance between successive crests of the wave is 4cm. What is the frequency of the wave?
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2000
If a positively charged glass-rod is used to charge an electroscope X by contact and an electroscope Y by induction, then
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