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Friday, April 9, 2010

Hot Air Balloon in Putrajaya

Recently i managed to catch a closer look on hot air balloon event which was held in Putrajaya. Unfortunately when my turn was almost there, the lightning flashed and the sky rained on us. Well at that time i would rather stay on the ground rather than risking my life a close encounter with the lightning :).. In the end the organiser had postponed the balloon from taking off .
Here is some of the interesting shots to be shared during the event..

The picture looks interesting rite :)...anyway i have some questions  to all of u. During the event, the organiser allowed spectators to ride the ballon only for these 2 sessions, i.e


i. as early as  8am  to  11am, or
ii. ..from 6pm  to  8pm

Haha..by using relevant physics concept :), can u explain why these two session are chosen? Why can't it be at 12pm, 3pm or 4pm?
Lets share your answer in the comment section..let's see who can give the most accurate answer :)

11 comments:

Jaclyn_23 said...

my guess is the pressure of air...
it's hotter in the afternoon, therefore the air pressure pressing on the air balloon might cause it to explode or something like that...
i'm getting C in physic >.<

*~ Memory ~* said...

My Answer : Hot air balloon ride can only be done in these 2 sessions because of the temperature....
As we know Hot Air is less dense than cool air,
if those hot air balloon is ride at 12.00 noon, temperature of hot air up there will be very hot that will cause the hot air balloon to explode....
Next, if we ride te balloon at 8am to 11 am or 6pm to 8pm ~
temperature of air up the sky is low, hence the possibility of hot air balloon to explode is small ~~

haha ~ just a stupid answer ~

*~ Memory ~* said...

oops ~ and in addition ~ the reason of causing the hot air balloon to explode also ~~
higher temperature = kinetic energy of gas atom higher ~ = pressure higher ~ = explode ~

Nazrin said...

Hye hye.. This is Archimedes Principle.. The water displaced is equal to the medium displaced :) hehe.. something like that.. Well i guess the weather really do play a main role at this point..

Najla said...

What.. that was a nice answer from both participant.. LOL.. Yeah.. it do sounds like correct to me.. hmm..

Nazrin said...

Hye Hye.. how about this.. We know that in the afternoon.. It's hotter right.. so if the hot air ballon is used at the point.. it will GO HIGHER -.-".. LOL..

Cikgu Ahmad said...

hmm mcm2 teori keluar :)some answers does make sense.. sampai meletup tu yg tak tahan tu ;) Anyway gud try but still incomplete & keep trying guys..memory, thres no stupid answers, at least u've tried it :) ..

pakya said...

jawapan saya camnie

nama pon hot air belon
so operating dgn adanya hot air

since hot air less dense than cold air

so belon tu akan naik bila udara dalam belon tu dipanaskan

kalo pukol 12,3 atau 4,yang kita semua tau panas terik

zzz...kita panaskan lama2 pon belon tu belom tentu naik (kalo naik pon tak tinggi mana...),sbb udara dlm belon walaupon panas belom tentu lebih panas dari udara kat atas sana

paham tah...cara jawab xbest langsung

betol tah cikgu jawapan dia?

Cikgu Ahmad said...

yes pakya..u've got the general idea..cuma jwpn tu akn jadi lebih cntik kalau u relate it to relevant physics principle

pakya said...

physics principle?erm...

disebabkan dia ada kena ngena ngan density...

archimedes principle?

(pakai hentam ja lama dah xbukak buku fizik)

Unknown said...

masa itu udara sejuk so densitynya lbh tinggi drp hot air balloon. so hot air balloon get more upthrust cos beza density udara panas dan sejuk lebih besar

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