Free School Management System
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SECTION A (25 Marks)Answer ALL questions
Break surface tension
Metal is a better conductor of heat than wood.
The metal handle conducts heat away from the body faster than a wooden handle.
The thick walled glass is more likely to crack.
Glass is a poor conductor of heat. On the thick-walled glass, the inner wall expands more than the outer wall while the thin –walled glass expands uniformly.
Less friction in B
Second pulley in A reduces efficiency
The centrea of gravity is lowered /falls /w.t.e
Rise in temperature increases kinetic energy of gas molecules/particles increasing collision of the particles with walls of the container.
Speed is reducted.
Mass is increased and momentum is conserved.
The oil patch formed is one molecule thick/a monolayer.
SECTION B (55 Marks)Answer ALL questions
-Makes walking easier
-Friction between matchstick head and rough surface develops heat igniting the stick head
-Friction between brake drum and brake lining halts the vehicle
-Causes wear, tear and noise between moving parts of a system
-Causes energy loss since work has to be done against it
(a). At high pressure is low so boiling point is low pressure cooker increases pressure inside