General paper discussion

[Kamihus]

kamihus
do u remember what was Q25?

i guess it was the plane mirror one bcoz i got that wrong 2

 

[Kamihus]

dude for 14. not small size....plane mirror produces exact same size image...the asnwer was virtual and not inverted....
and it was GPE To Kinetic+thermal, not gpe to kinetic to thermal

ok dude i know already
dont scare me now bcoz ive already got 4-5 wrong
what did u write in that pressure volume one
i saved them on my calculator like this in my 570-MS:
A=and then all the answers to A
B=...
the remaining go to E,F,X and Y
like E represents remaining of A and so on

 

[Snowysangel]

dude for 14. not small size....plane mirror produces exact same size image...the asnwer was virtual and not inverted....
and it was GPE To Kinetic+thermal, not gpe to kinetic to thermal

The person slowed down which meant kinetic energy was being converted into heat energy

 

[Snowysangel]

How was bio p1? Got any answers wrong 0

 

[usama321]

The person slowed down which meant kinetic energy was being converted into heat energy

yeah the person was slowing down.........now how can it be converting to kinetic when he was slowing down..........i also wrote kinetic+g.p to thermal

 

[Saad Mughal]

yeah the person was slowing down.........now how can it be converting to kinetic when he was slowing down..........i also wrote kinetic+g.p to thermal

My point exactly. The kinetic energy was decreasing as he was going down, which means that he was losing kinetic energy. The only form of losing the kinetic energy was heat so it should have been G.P.E + K.E --> Thermal Energy.
Now, if his G.P.E was being converted to K.E and Heat Energy, why would he slow down? He would either speed up or maintain a constant speed.

 

[Snowysangel]

My point exactly. The kinetic energy was decreasing as he was going down, which means that he was losing kinetic energy. The only form of losing the kinetic energy was heat so it should have been G.P.E + K.E --> Thermal Energy.
Now, if his G.P.E was being converted to K.E and Heat Energy, why would he slow down? He would either speed up or maintain a constant speed.

What no. It was GPE --> KE--> TE

 

[Snowysangel]

How were your bio exams?

 

[Saad Mughal]

What no. It was GPE --> KE--> TE

Ok, if G.P.E. was being converted to K.E. first then why did he even slow down? Wouldn't he remain at the same speed?

 

[Saad Mughal]

Not taking Bio.

 

[Snowysangel]

Ok, if G.P.E. was being converted to K.E. first then why did he even slow down? Wouldn't he remain at the same speed?

As he was falling into the pool, he was gaining kinetic energy. At the highest point, his kinetic energy was 0 and PE was maximum. As he was falling, that PE was being converted to kinetic energy. But due to air resistance or something his KE was converted to heat energy. As a greater amount of kinetic energy was being converted to heat energy, he slowed down
Plus where did the kinetic energy come from in the 1st place then,

 

[Saad Mughal]

As he was falling into the pool, he was gaining kinetic energy. At the highest point, his kinetic energy was 0 and PE was maximum. As he was falling, that PE was being converted to kinetic energy. But due to air resistance or something his KE was converted to heat energy. As a greater amount of kinetic energy was being converted to heat energy, he slowed down
Plus where did the kinetic energy come from in the 1st place then,

Didn't they mention that already? That he was swimming down at a great speed and eventually slowed down by the bottom of the pool?

 

[usama321]

i think it was something like what was the change as the diver fell into the water and something like that

 

[Snowysangel]

Didn't they mention that already? That he was swimming down at a great speed and eventually slowed down by the bottom of the pool?

Ya so he was gaining kinetic energy as he was falling. At the top of the plank, his KE was zero as I've mentioned already, so his PE had to convert into KE

 

[Saad Mughal]

Ya so he was gaining kinetic energy as he was falling. At the top of the plank, his KE was zero as I've mentioned already, so his PE had to convert into KE

I don't exactly remember but I think it was mentioned that he was travelling at his greatest/maximum speed.

 

[danial 234]

I don't exactly remember but I think it was mentioned that he was travelling at his greatest/maximum speed.

yes it was mentioned

 

[Snowysangel]

I don't exactly remember but I think it was mentioned that he was travelling at his greatest/maximum speed.

Yeah so? I never said it wasn't...but the question also alluded to the fact that he fell from a plank or something..I remember it made a reference to how his PE was maximum at the top and that he had no kinetic energy AT THE START

 

[Saad Mughal]

Yeah so? I never said it wasn't...but the question also alluded to the fact that he fell from a plank or something..I remember it made a reference to how his PE was maximum at the top and that he had no kinetic energy AT THE START

When he jumped off the plank, didn't he have K.E. Energy?

 

[usama321]

When he jumped off the plank, didn't he have K.E. Energy?

i think the question was about the energy change as he was falling.............not the overall change...can anyone confirm? if yes than he had both K.E and G.P at the start

 

[thementor]

My point exactly. The kinetic energy was decreasing as he was going down, which means that he was losing kinetic energy. The only form of losing the kinetic energy was heat so it should have been G.P.E + K.E --> Thermal Energy.
Now, if his G.P.E was being converted to K.E and Heat Energy, why would he slow down? He would either speed up or maintain a constant speed.

What no. It was GPE --> KE--> TE

see ur all confused...tell me in ur right mind: if all of the energy is converted into useless heat energy how the hell would he move...