Physics: Post your doubts here!

[Mijandi@7]

Since we are talking in terms of power which is energy per second, we should be doing all our calculations of energy for 1 second only.

Well the volume is 1.5 x 10^4 per hour so per second the volume consumed should be
1.5 x 10^4/3600 = 4.17 cm3 <------ this is the volume consumed per second.

Now the energy transferred per second will be
4.17 x 34 = 141.7 kJ <----- it can be called the power transferred to the engine as well becuz its energy per second right?

Moving on to the power wasted.
Now the 141.7kJ is the TOTAL power.
While 40kJ is the useful power.
So to find the waste --------> total - useful = 141.7 - 40 = 101.7
Round it off to 102 kJ
Hoping it helped

thanks for solving

 

[Anirudh Singh]

Where can i get answers of physics, chemistry, bio textbook exercises

 

[Anirudh Singh]

where can i get the answers of textbook exercise of phy, chemistry and bio

 

[Anirudh Singh]

where can i get the answers of textbook exercise of phy, chemistry and bio

 

[Anirudh Singh]

where can i get the answers of textbook exercise of phy, chemistry and bio

 

[Anirudh Singh]

where can i get the answers of textbook exercise of phy, chemistry and bio

 

[Anirudh Singh]

where can i get the answers of textbook exercise of phy, chemistry and bio IGCSE

 

[studyingrobot457]

W

where can i get the answers of textbook exercise of phy, chemistry and bio IGCSE

Why so much spamming, you get them on the CD, you can get CD files from gceguide.xyz

 

[Saikat Alam]

Can someone explain Kirchhoff's laws to derive the resistance formulae?

 

[Kanekii]

Can someone explain Kirchhoff's laws to derive the resistance formulae?

Kirchoffs first law states that the amount of current flowing in a junction is equal to the amount leaving junction so therefore:
I=I1 +I2
V/Rt=V/R1 + V/R2
Cancel V
1/Rt=1/R1 + 1/R2
Keep in mind this is only for parralel circuits

 

[Kanekii]

I would advise you to give them in may as composite because you know A2 is also difficult and if you keep on preparing for A1 till oct than you will have very little time left for A2 which will be a disadvantage.
A2 syllabus includes all that learned in A1 and A2 thus it will also help you revise for your paper 4 & 5.
Stay calm ...stay focused and work hard for the next 6 months and please try and stay away from every leisure activity.
This is a very precious time don't waste it.
Inshallah you will be successful.Work hard and leave the rest to Allah.

InshaAllah,you too
Thanks alot I feel alot better now, i've thoroughly planned my counter strategy . Since i had 4 subjects i'll drop one subject which is Bio since my passion is in computer science engineering. I'll give Excel for Chem and Maths only and i'll carry my Physics grade

 

[Hamnah Zahoor]

InshaAllah,you too
Thanks alot I feel alot better now, i've thoroughly planned my counter strategy . Since i had 4 subjects i'll drop one subject which is Bio since my passion is in computer science engineering. I'll give Excel for Chem and Maths only and i'll carry my Physics grade

You are welcome... Inshallah you will be successful next time.

 

[A*****]

InshaAllah,you too
Thanks alot I feel alot better now, i've thoroughly planned my counter strategy . Since i had 4 subjects i'll drop one subject which is Bio since my passion is in computer science engineering. I'll give Excel for Chem and Maths only and i'll carry my Physics grade

Good decision to drop bio...A2 bio is ridiculous!
Btw from where are u planning to do cs engineering?

 

[Kanekii]

Need help with this:
A simple pendulum suspended from a fixed point, Consists of a light cord of length 500mm and a bob of weight 2N. The bob is made to move in a horizontal circular path. If the maximum tension which the cord can withstand is 5N show whether or not it is possible for the radius of the path of the bob to be 300mm

Ans= 2.5N(maxtension) and 460mm (max radius)

 

[Kanekii]

Good decision to drop bio...A2 bio is ridiculous!
Btw from where are u planning to do cs engineering?

Hahaha ikr it has become so weird.
Jik, Nust and plenty of others or probably abroad.

 

[Saikat Alam]

Kirchoffs first law states that the amount of current flowing in a junction is equal to the amount leaving junction so therefore:
I=I1 +I2
V/Rt=V/R1 + V/R2
Cancel V
1/Rt=1/R1 + 1/R2
Keep in mind this is only for parralel circuits

Thank you Kanekii and maybe gravitational energy and kinetic energy formulas will work for your problem, best of luck, I'll post if I find a solution about your one.

 

[Kanekii]

Thank you Kanekii and maybe gravitational energy and kinetic energy formulas will work for your problem, best of luck, I'll post if I find a solution about your one.

No that wont work since this question is from Circular motion

 

[Saikat Alam]

No that wont work since this question is from Circular motion

Oh that makes sense. In that case I'm out, no idea about circular motion. Would be glad if someone else helped work this out.

 

[Saikat Alam]

Could someone explain the basic definitions in circuits like charge, power, current etc?

 

[Psyvlone007]

can anyone please me help me with some notes of momentum? urgent please