K.C.S.E Physics Q & A - MODEL 2018PP1QN17
​ (a) State Pascal’s principle of transmission of pressure in liquids.
(b) Figure 10 shows heights of two immiscible liquids X and Y in a U-tube (drawn to scale). 
​(i) State with a reason which of the two liquids X and Y has a higher density.
(ii) Determine the value of h. (iii) Given that the density of liquid Y is p, write down an expression for the density d of liquid X ¡n terms of p. (c) (i) With the aid of a diagram, describe how a liquid may be siphoned from one container to another using a flexible tube. (ii) State one application of the siphon.
answers
(a) Pressure applied at one part in a liquid is transmitted equally to all other parts of the enclosed liquid.
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K.C.S.E Physics Q & A - MODEL 2018PP1QN04
​Figure 2 shows an instrument used to measure atmospheric pressure.
​State with a reason the modification that would be required in a similar set up if mercury were to be replaced with water.
answer
K.C.S.E Physics Q & A - MODEL 2017PP1QN18
(a) Figure 8 shows part of a hydraulic brake system.
​Describe how the systems works.
(b) State three conditions necessary for a driver to negotiate a bend on a flat level road at a relatively high speed. (c) Figure 9 shows two identical cans U and V each with a small opening at the top. Different amounts of water were put into the cans and heated until the water started to boil. 
​Explain what will be observed when both cans are then suddenly dipped into a cold water bath.
answers
(a) (i) The driver applies a force on the pedal.
This force transmits pressure the master cylinder fluid. Equal pressure is transmitted to the wheel cylinder causing the pistons of the wheel cylinder to push brake shoe hence Pressing the brake pads that in turn press the wheel reducing its rotation. When the applied force is removed, the return spring pulls back the shoe and pistons to the original position. (b) Higher friction (wider tyres, rougher road) Lower radius Higher mass (c) U is observed to crush. It has more steam which when cooled creates a greater vacuum hence pressure causes collapsing. K.C.S.E Physics Q & A - MODEL 2016PP1QN10Figure 8 shows two cylinders of different cross-sectional areas connected with a tube. The cylinders contain an incompressible fluid and are fitted with pistons of cross-sectional areas 4 cm2 and 24 cm2.
Opposing forces P and Q are applied to the pistons such that the pistons do not move. If the pressure on the smaller piston is 5 N cm2, Determine force Q.
answer
A student wearing sharp pointed heeled shoes is likely to damage a soft wooden floor. Explain.24/7/2020
K.C.S.E Physics Q & A - MODEL 2015PP1QN05
A student wearing sharp pointed heeled shoes is likely to damage a soft wooden floor. Explain.
ANSWER
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