ALL PHYSICS DOUBTS - POST HERE !!

[haris94]

So can u do the conversion and show me please because i keep getting 6.4 ??
In both with and without???
Thanks

without conversion:
p=      (2*10^5)*80
                  25
u should get 640000 Pa

with conversion:
p=      (2*10^5)*(8*10^-5)                                  1 m3 = 1000000 cm3
                   (2.5*10^-5)
u should get 640000 Pa
              

[SoONa]

1.The circuit of a motor racing track is 3 km in length. In a race, a car goes 25 times round the
circuit in 30 minutes.
What is the average speed of the car?
A 75 km / hour
B 90 km / hour
C 150 km / hour
D 750 km / hour


2. A sample of a solid is heated for 12 minutes and its temperature noted every minute.
The results are shown in the table.
time / min 0 1 2 3 4 5 6 7 8 9 10 11 12
temperature / °C 11.5 16.1 22.1 31.0 31.1 31.1 31.1 31.3 45.0 65.2 66.2 66.3 66.3
How should the sample be described at the end of the 12 minutes?
A all solid
B in the process of melting
C all liquid
D in the process of boiling




thanks in advance

[Ivo]

By the way, just wanted to know whether solving past papers for 1993-2000 is worth it for P1, or should I do all of 2003 onwards first.

[The Golden Girl =D]

By the way, just wanted to know whether solving past papers for 1993-2000 is worth it for P1, or should I do all of 2003 onwards first.

2000 and onwards  

[Weaam]

So can u do the conversion and show me please because i keep getting 6.4 ??
In both with and without???
Thanks

Tuleen?

[Girlie45]

No Clue. CIE is evil.

LOL agreed.

[Ivo]

1.The circuit of a motor racing track is 3 km in length. In a race, a car goes 25 times round the
circuit in 30 minutes.
What is the average speed of the car?
A 75 km / hour
B 90 km / hour
C 150 km / hour
D 750 km / hour


2. A sample of a solid is heated for 12 minutes and its temperature noted every minute.
The results are shown in the table.
time / min 0 1 2 3 4 5 6 7 8 9 10 11 12
temperature / °C 11.5 16.1 22.1 31.0 31.1 31.1 31.1 31.3 45.0 65.2 66.2 66.3 66.3
How should the sample be described at the end of the 12 minutes?
A all solid
B in the process of melting
C all liquid
D in the process of boiling




thanks in advance

Answer is 150 km/h, because 150/0.5 is that.

[Dana]

By the way, just wanted to know whether solving past papers for 1993-2000 is worth it for P1, or should I do all of 2003 onwards first.

I think you should do older ones, there was a qs that came in chem yesterday from may 2000. Copy paste. I think CIE thinks we'll like forget abt the older ones so they get more questions from previous years also take a look at gce

[Dana]

I'll say, Phy P1 will be harder than Chem P1, but then P3 would be easier than Bio!

Hahaha Bio was the WORST exam ever!  I hated it! And I'm pretty worried abt chem and physics p3 :/

[Ivo]

1.The circuit of a motor racing track is 3 km in length. In a race, a car goes 25 times round the
circuit in 30 minutes.
What is the average speed of the car?
A 75 km / hour
B 90 km / hour
C 150 km / hour
D 750 km / hour


2. A sample of a solid is heated for 12 minutes and its temperature noted every minute.
The results are shown in the table.
time / min 0 1 2 3 4 5 6 7 8 9 10 11 12
temperature / °C 11.5 16.1 22.1 31.0 31.1 31.1 31.1 31.3 45.0 65.2 66.2 66.3 66.3
How should the sample be described at the end of the 12 minutes?
A all solid
B in the process of melting
C all liquid
D in the process of boiling




thanks in advance

D, I reckon for the second one.  Cos of latent heat for 2nd time, no change in temp for boiling or melting.

[Ivo]

Hahaha Bio was the WORST exam ever!  I hated it! And I'm pretty worried abt chem and physics p3 :/

Chem P3, I wouldn't be worried about that, we've got half-term to revise.

Phy P3, I'm worried!

Bio P3, worst in 10 years, says it all!

[SoONa]

Yup ur write for both thank u but 4 the 1st 1 wht did u do 2 get 150 i didnt get it maybee my nerves r getting 2 meee

[Ghost Of Highbury]

D, I reckon for the second one.  Cos of latent heat for 2nd time, no change in temp for boiling or melting.

in the process of boiling??

[Ivo]

in the process of boiling??

Yeah, that's what I'm thinking, cos melting is 31 degree bit.

[Dana]

Chem P3, I wouldn't be worried about that, we've got half-term to revise.

Phy P3, I'm worried!

Bio P3, worst in 10 years, says it all!

Yea at least we've got abt 10 days to revise for chem
was your bio exam all about ecology and then like one thing abt reproduction? or did you have another variant that had absolutely nothing abt humans?