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State two factors that affect upthrust on an object.
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A part from radius, state two other factors that affects centripetal force on a body going round a bend.
Date posted: January 16, 2017 . Answers (1)
Define efficiency of a machine.
One of the factors that can lower the melting point of ice is addition of impurities. State one other.
When a steel ball bearing is dropped into a tall jar full of glycerine, it falls to reach a point when it attains a steady velocity. State the force that varies to make this possible.
A door handle is always fixed well away from the hinge. Explain
Milk in a bottle cools faster when the bottle is wrapped with a wet towel than when it is immersed in a bucket of cold water. Explain
Define specific latent heat of vaporization.
State samples of bromine vapour are allowed to diffuse separately under different conditions; one in vacuum and the other in air. State and explain the observation made.
It is easier to stop a saloon car than a bus moving at the same velocity. What is the reason?
Date posted: January 14, 2017 . Answers (1)
Explain why passengers are discouraged from standing on the upper deck of a double-decker bus.
An air bubble is observed to increase in size as it rises through a liquid column and bursts on reaching the surface. Explain this observation.
A half-metre rule of mass 50 g balances off-centre when a 20 g mass is suspended at the 2 cm mark. Determine the position of the pivot.
Factors that affect the rate of flow of heat through a metal conductor