Physics Question Paper

Physics

Course:Physics

Exam Year:2012

HOLIDAY MATHSCIENCE NETWORK

HOMNET

HOMNET AUGUST 2012 PROGRAM
PHYSICS FORM ONE WEEK TWO
MONDAY 20th AUGUST 2012
1. A small nail may pierce an inflated car tyre and remain there without pressure reduction in the tyre. Explain this observation

2. Give a reason why a concrete beam reinforced with steel does not crack when subjected to changes in temperature

3. Give a reason why heat transfer by radiation is faster than heat transfer by conduction

TUESDAY 21ST AUGUST 2012
1. Name two forces that determine the shape of liquid drop on the solid surface.

2. State the reason why it may not be possible to suck liquid into your mouth using drinking straw on the surface of the moon.

3. The height of the mercury column in a barometer at a place is 64cm. What would be the height of a column of paraffin in barometer at the same place? (Density of paraffin = 8.0 x 102 kgm-3)

WEDNESDAY 22ND AUGUST 2012
1. Give a reason why the weight of the body varies from place to place

2. A metal pin was observed to float on the surface of pure water. However the pin sank when a few drops of soap solution were carefully added to the water. Explain his observation.

THURSDAY 23RD AUGUST 2012
1.Figure 5 shows a bimetallic strip at room temperature. Brass expands more than invar when heated equally.

Sketch the bimetallic strip after being cooled several degrees below room temperature.
2.A positively charged rod is brought near the cap of a leaf electroscope. The cap is the earthed momentarily by touching with the finger. Finally the rod is withdrawn. The electroscope is found to be negatively charged. Explain how this charge is acquired.

FRIDAY 24TH AUGUST 2012
1. A bag of sugar is found to have the same weight on planet earth as an identical bag of dry sawdust on planet Jupiter. Explain why the masses of the two bags must be different.

2.A wooden bench and a metal bench are both left in the sun for a long time. Explain why the metal bench feels hotter to touch.

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