Question 4841:

A hose of cross-sectional area 0.5m? is used to discharge water from a water tanker at a velocity of 60 ms-1 in 20s into a container. If the container is filled completely, the volume of the container is _____________

A. 240m
B. 600m
C. 2400m
D. 6000m

Question 4842:

Water does not drop through an open umbrella of silk material unless the inside if the umbrella is touched. This is due to

A. Capillarity
B. Osmotic pressure
C. Viscosity
D. Surface tension

Question 4843:

A piece of stone attached to one end of a string is whirled round in a horizontal circle and the string suddenly cuts. The stone will fly off in a direction

A. Perpendicular to the circular path.
B. Parallel to the circular path.
C. Tangential to the circular path.
D. Toward the centre of the circle

Question 4844:

A 90cm uniform lever has a load of 30N suspended at 15cm from one of its ends. If the fulcrum is at the centre of gravity, the force that must be applied at its other end to keep it in horizontal equilibrium is _____________

A. 15N
B. 20N
C. 30N
D. 60N

Question 4845:

By what factor will the size of an object placed 10cm from a convex lens be increased if the image is seen on a screen placed 25cm from the lens?

A. 15.0
B. 2.5
C. 1.5
D. 0.4