Question 1
The figure below shows change in volume of water in a measuring cylinder when a solid is immersed in it
Given that the mass of the solid is 463g, determine the density of the solid in gcm-3 (give your answer correct to 2 decimal places)
Answer
Question 2
One of the applications of pressure in liquids and gases is the lift pump. The pump is more effective in pumping water if the well is less than 10m at sea level. Explain
Answer
Atmospheric pressure can support a column of water to a maximum of 10m at sea level
Question 3
The figure below shows the level of mercury and water in a beaker
Explain the difference in the shape of the meniscus
Answer
In water, there is a stronger adhesive force than cohesive force while in mercury, there is stronger cohesive force than adhesive force
Question 4
The figure below shows a hydraulic lift used to lift a load ‘L’. The effort applied is 150N at the end of a lever 36cm long and pivoted at the other end and, plunger is 6cm from the pivot. The area of the plunger piston C is 4cm2 and that of the load piston D is 400cm2.
Answer
Question 5
The figure below shows the levels attained by two liquids L1 and L2 after the temperature has been raised. The liquids were initially at the same levels as shown. The tubes are identical and closed at the lower end
i) Mark on the same diagram the relative levels of the liquids when the temperature is lowered below the initial value
ii) Give a reason for your answer
Answer
i)
ii) Liquid L2 contracts faster than liquid L1
ii) Liquid L2 contracts faster than liquid L1