UNIPORT Physics 2006/2007 Past Questions

Practice each question, then open it to see the full details.

Which of the following statement about liquid pressure is NOT correct? The pressure

A.At a point in a liquid is proportional to the depth
B.at any point in a liquid is the same at the same level
C.is exerted equally in all directions at any point
D.of a liquid at any point of its container acts in a direction perpendicular to the wall
E.at a particular depth depends on the shape of thee vessel

A ship travelling towards a cliff receives the cho of its whistle after 3.5 seconds. A short while later it receives the echo after 2.5 seconds. If the speed of sound in air under prevailing conditions is 250m/s how much closer is the ship to the cliff?

A.110m
B.125m
C.175m
D.350m
E.1000m

A force of 16N applied to a 4.0kg block that is at rest on a smooth horizontal surface. What is the velocity of the block at t = 5 second?

A.4m/s
B.10m/s
C.20m/s
D.50m/s
E.50m/s

The distance travelled by a particle starting from rest is plotted against the square of the time elapsed from the commencement of motion. The resulting graph is linear. The slope of this graph is a measure of

A.initial displacement
B.initial velocity
C.Acceleration
D.Half thee acceleration
E.Half the initial velocity

A small needle is carefully floated on water in a beaker. when a few drops of kerosene are introduced into the water, the needle sinks. Which of the following statement correctly explain(s) the observation?
i. There is tension on the water surface
ii. Kerosene reduces the density of water so that the needle becomes denser than water
iii..Kerosene reduces the surface tension of water

A.I only
B.II only
C.III only
D.I and II
E.I and III

Which of the following is a correct explanation of the inertia of a body?

A.Ability to overcome the earth's gravity
B.Reluctance to stop moving
C.Readiness to start moving
D.Reluctance to start moving and its readiness to stop moving it has begun to move
E.Reluctance to start moving and its reluctance to stop moving it has begun to move

Two masses 40g and 60g are attached firmly to the ends of a light metre rule. The centre of gravity of the system is

A.At the midpoint of the metre rule
B.40cm from the lighters mass
C.40cm from the heavier mass
D.60cm from the heavier mass

The mode of heat transfer which does not require a material medium is

A.Conduction
B.Radiation
C.Convection
D.Propagation

When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice tat of q. The mass of P is half of , the ratio of the specific heat capacity of P to Q is

A.1:4
B.4:1
C.1:1
D.2:1

Which of the following conditions will make water boil at a temperature of 100°C when the atmospheric pressure is 750mm Hg.

A.Increase the external pressure
B.Reduce the external pressure
C.Heat more rapidly at the same pressure
D.Reduce the external pressure by a quarter