Macbook pro 13" CPU A Diode temperature

Hi all,
I have recentlypurchased MBP13 inches (Intel Core i5 2.4 ghz, 500 G HDD, Internationalkb). I observed a difference in CPU heating behaviour compared to mypreviously used MBP 15" (2008 version).
So I did the following test:
1. CPU Temperature after 10 minutes idle (no activity except hardware monitor; user load 1-3% as measured by istat pro) :
observations:
CPU A temp diode: 42 degree C.
CPU core 1: 40 deg C
CPU core 2: 41 deg C
CPU core 3: 40 deg C
CPU core 4: 41 deg C
2. CPU temperature after 10 minutes of constant intense CPU activity ( 100% CPU load) given on both cores of the CPU
(by typing command in two terminal windows: yes > /dev/null)
CPU A temp diode : 93 degree C.
CPU core 1: 99 deg C
CPU core 2: 99 deg C
CPU core 3: 95 deg C
CPU core 4: 98 deg C
I have got two questions:
1. Is this a normal behaviour of i5 CPU heating ?
2. Why does the hardware monitor show 4 cores of CPU when in fact Intel i5 is a dual core processor ?
Thanks

Well, I talked to Apple support and tried to find out whether my observed temperature ranges vs CPU load were normal. Surprisingly, they told me that they haven't got any publicly available information on this phenomenon. 
I have also inserted a plot of temperature rise vs CPU load here.
So it sounded like Apple does not want to come transparent about this issue with their customers. They only advised me to contact the nearest service center and see what is their opinion. Now in the absence of any precise and standard information about temperature ranges, I don't know what would be the basis of opinion from service center.
@pixelized - I suppose i7 overheating is increasingly discussed. But mine is i5. I guess the temperature rise vs CPU load should be different between the two processors. I have never observed temperatures like 120 C, even after 10 mins of 100% CPU load on both cores or by watching videos. Ambient room temperature was 18C in my case.
If anyone has obtained observations of temperature rise on i5, I would appreciate if you share them here.

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  • Macbook Pro Retina CPU Overheating when doing simple tasks?

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    Turn off Skype and see if that has any affect.  Skype is is a notorious heat generator.
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  • Macbook pro 13" cpu 320%

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    PRAM/NVRAM
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  • Operating Temperature Limit for MacBook Pro

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  • Please Post Macbook Pro Temperatures here.

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    http://www.versiontracker.com/dyn/moreinfo/macosx/19994 (a comprehensive application)
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    Message was edited by: henri5000

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