All the Getmethinking, A*booklets, Onsponge not gone to waste.

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Heard it was easy

How is the paper today?

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A good question from a new assessment book which could be similar to a past school 2010 prelims paper from a neighbourhood primary school. Could be solved by model drawing, a powerful tool for solving Maths question.

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What is the COP for entry to the secondary schools?

PSLE 2012 is almost completed (with the exception of HMT). The Maths and Science papers have some interesting and challenging questions that are new and require good thinking skills to grasp and answer. These interesting questions will probably be out in the next copy of 5 year series that will be sold usually at beginning of year in 2013.


All the best to this year’s P5 students in their coming SA2 and be your best in preparing for PSLE 2013.

BeContented:

James Ang:

[quote=\"kiasu学生\"]

ill try

Q: Some buildings use a cooling mist system 2 lower the temperature of the surroinding air. the mist comes out in the form of small water droplets.

Q: How does the cooling mist system help 2 lower the temp of the surrounding air? (2m)

some fans were added 2 the coolinf mist systeem.

Q: how do the fans help in the cooling mist system? (1m)

that should be this pprs killer Q

Evaporation of mist takes away heat and causes cooling as heat is required to change the mist from liquid state to water vapour which is gaseous state. By creating mist instead of using only water, the surface area of the water is increased and the greater the exposed surface area, the greater the rate of evaporation.

The use of fans creates wind which is moving air and the presence of wind increases the rate of evaporation and produces a greater cooling effect.

DS says 'Wah. This answer way better than mine'.
Thanks to you too.[/quote]This type of mist producing fans can be seen at some outdoor coffee shops and cafes especially in hot weather Singapore.

kiasu学生:

SAHM_TAN:

[quote=\"kiasu学生\"]agreed. jus did ppr and seems that booklet B is different, has a lot of.... unusual daily liife application qs, not just regurgitaion of facts like most r used 2... but lucky bklt B has less weightage than sec. A

Pls give an example of the qn from bklet b if you are able to remember. Thanks

ill try

Q: Some buildings use a cooling mist system 2 lower the temperature of the surroinding air. the mist comes out in the form of small water droplets.

Q: How does the cooling mist system help 2 lower the temp of the surrounding air? (2m)

some fans were added 2 the coolinf mist systeem.

Q: how do the fans help in the cooling mist system? (1m)

that should be this pprs killer Q[/quote]Evaporation of mist takes away heat and causes cooling as heat is required to change the mist from liquid state to water vapour which is gaseous state. By creating mist instead of using only water, the surface area of the water is increased and the greater the exposed surface area, the greater the rate of evaporation.

The use of fans creates wind which is moving air and the presence of wind increases the rate of evaporation and produces a greater cooling effect.