Recent content by alex36

My syllabus has point *' 'describe and compare the forces on mass, charge and current in gravitational, electric and magnetic fields, as appropriate" what does this mean ?

Thank you so much :)

I just checked . Answer will have same value but different sign . Am I correct?

Isn't it (-GMm/x-(-GMm/(x+h))? because energy we get is negative from your form of euation . does it matters?

distance from the surface of planet

Suppose the mass of planet is" M" and there is body in its surface whose mass is "m" and the field strength is "g" . If the body is thrown 1800 m then Gravitational Potential energy = mg(1800). My question is why can't we use formula GPE= GMm/x ? This is also the formula for gpe but why...

That was too easy ! thanks man

-273K is called absolute 0 temperature where there is no any kinetic energy in molecule . Practically it doesn't exist but theoretically it does . So, my question is why absolute zero temperature doesnot depend upon property of particular substance.

In my syllabus its written "understand that there is an absolute scale of temperature that does not depend on the property of any particular substance"

Why absolute zero of temperature doesn't depend upon properties of substance?

Hello, I got "b,b and U" in 3 modules of As which was written as overall of "b" grade . Now I have got 2 modules for A2 examination. how much should I score to get an A?

Haha ,Now I understand Dude . Thank you :woot:

So, why can't we use hard x-ray for scanning tissues as it is less absorber.

I got question in exam, 1) How to control hardness of X-ray? 2) why low frequency of x-ray is used for investigating tissue?? so in 1) what does controlling hardness means?? and in 2) can't we use high frequency of X-ray ?so that it will penetrate more as tissue are poor absorber...

Why reverse diode is used in relay ?? In my book its written that ,to protect op amp from damage but how does it protects?