Discussion for physics P12

[hamza budhani]

I ALSO THINKITS A

 

[lol_foreva]

I ALSO THINKITS A

yay!
2 against the world!
lol

 

[humdono]

I ALSO THINKITS A

it cannot be A it is D as there is acceleration of free fall so the longer it travels the more it would have accelerated so the speed would be greater at the lowest point

 

[umair1161]

Hey man I did paper 12 too!
here is what i wrote.
I wrote C (discharge and charge) for that question
For the circuit question it was A. they were all ammeters because they were all connected in series
I wrote the nucleon number as P because it said it was a nuclide
The density of the liquid was A, 0.875 because 8 cm^3 water evaporated and there was a difference of 7 grams on the scale so density=Mass/Volume
I wrote Infrared>Visible light> UV for the frequency
The answer for that one is radio waves for the satellite.
Hope I helped. I'm positive all these answers are correct. Hope we both do well

thanks!!

 

[umair1161]

i thought that the weighing scale was 1000N but how is it 500N??

 

[vishalgodhani]

microwaves are used for satellites not radiowaves

correct.....

 

[AbhishekTSS]

Sorry about that it seems microwaves is the correct answer. Guess I lose 1 mark
Anyway the weighing scale is 500N because the force on the weighing scale remains the same. Try this out yourself on a real weighing scale. This might have confused you because of the link between Pressure, force and area. On one foot the pressure increases because there is more force on a smaller area but the weight and mass remains the same.

 

[sundas]

But the question stated that "it was falling through air".. that means as the speed increases the air resistance also increases so the lower point will be having lower speed..i think the answer should be A

 

[umair1161]

Sorry about that it seems microwaves is the correct answer. Guess I lose 1 mark
Anyway the weighing scale is 500N because the force on the weighing scale remains the same. Try this out yourself on a real weighing scale. This might have confused you because of the link between Pressure, force and area. On one foot the pressure increases because there is more force on a smaller area but the weight and mass remains the same.

guyess i've lost 4 marks already :'(.... thanks anyways!

 

[umair1161]

But the question stated that "it was falling through air".. that means as the speed increases the air resistance also increases so the lower point will be having lower speed..i think the answer should be A

tell me this.....when something is accelerating, what is the resultant for it?? its in teh direction it's accelerating towards right?? therefore....even when air resistance is affecting the ball, the ball will keep accelerating and therefore....at the last points....it is at its highest speed with least time taken!

 

[sundas]

I agree with you..the ball is accelerating but the initial acceleration is greater due to lower air resistance.

 

[Lightning soul]

Sorry about that it seems microwaves is the correct answer. Guess I lose 1 mark
Anyway the weighing scale is 500N because the force on the weighing scale remains the same. Try this out yourself on a real weighing scale. This might have confused you because of the link between Pressure, force and area. On one foot the pressure increases because there is more force on a smaller area but the weight and mass remains the same.

I wrote radio waves as well. Here's what i found out. Satellites use a wide variety of waves including radio and micro. Since microwaves operate at a higher frequency, they can carry a larger bandwidth.

 

[umair1161]

I wrote radio waves as well. Here's what i found out. Satellites use a wide variety of waves including radio and micro. Since microwaves operate at a higher frequency, they can carry a larger bandwidth.

Well mr scientist....u have just saved me from a heart attack!

Thanks and good job (Y)

 

[lol_foreva]

oh guyz, wat dya think was the asnwr to the ques wich asked somethin bout th highest temp change( 4 blocks were givn)
wat was the ans,i put the smallest box,wbu guyz?

 

[humdono]

oh guyz, wat dya think was the asnwr to the ques wich asked somethin bout th highest temp change( 4 blocks were givn)
wat was the ans,i put the smallest box,wbu guyz?

it is the smallest box

 

[humdono]

oh guyz, wat dya think was the asnwr to the ques wich asked somethin bout th highest temp change( 4 blocks were givn)
wat was the ans,i put the smallest box,wbu guyz?

it is the smallest box