Primarygun

Actually, the 2nd question is very silly asked by me. LOL. Inertia always accompany 1 st in textbooks. However,I think it is the 2nd law.

No. I live in Hong Kong. The HKCEE which is equivalent to GSCE will be taken by me in May next year.

No. I live in Hong Kong. The HKCEE which is equivalent to GSCE will be taken by me in May next year.

Yes. I don't know how to reconcile. Therefore, that is my question asked.

Yes. I don't know how to reconcile. Therefore, that is my question asked.

1.Which newton's law describes inertia is proportional to mass? 1st or 2nd? 2.An object is on a slope, the graph of v-t shows that there is negative acceleration, how do you explain it ?

1.Which newton's law describes inertia is proportional to mass? 1st or 2nd? 2.An object is on a slope, the graph of v-t shows that there is negative acceleration, how do you explain it ?

Yes I know. By the diagram, how can we prove sin A ( 180>A>90 ) is y/r ? The algebra can prove this but the algebra is proved by this geometry, that's say if the geometry proof is wrong , algebra of the proof is wrong indeed. Can you show me the proof ? I can't find it in my book or web site.

Yes I know. By the diagram, how can we prove sin A ( 180>A>90 ) is y/r ? The algebra can prove this but the algebra is proved by this geometry, that's say if the geometry proof is wrong , algebra of the proof is wrong indeed. Can you show me the proof ? I can't find it in my book or web site.

The proof looks like, sin (180-A)= sin A, how can I get the geometry proof of this ? Anyone can help me ?

The proof looks like, sin (180-A)= sin A, how can I get the geometry proof of this ? Anyone can help me ?

How did mathematican define sin A ( A >90 degree) as [MATH]y/r[/MATH]? Are there any proofs to [MATH]sin 150 = sin 30 [/MATH]>?

How did mathematican define sin A ( A >90 degree) as [MATH]y/r[/MATH]? Are there any proofs to [MATH]sin 150 = sin 30 [/MATH]>?

Ya every action has reaction. In the free body diagram, reaction force is ommited unless there is a net force at that directon with the position, right?

Ya every action has reaction. In the free body diagram, reaction force is ommited unless there is a net force at that directon with the position, right?

Yes it really helps. Plants convert light energy into chemical energy stored in form of chemical energy in food. Breaking food liberates some chemical energy and at the higher th consumer cannot take in. Energy is loss in food chain. Is it?

Yes it really helps. Plants convert light energy into chemical energy stored in form of chemical energy in food. Breaking food liberates some chemical energy and at the higher th consumer cannot take in. Energy is loss in food chain. Is it?

although I know little about the scale, It seems to be very familiar to me. Anyone posted this before?

although I know little about the scale, It seems to be very familiar to me. Anyone posted this before?

Thanks for giving advice. So the wrong thing raised by me is that " the ground exert a force", right? Gravity pushes us touch grounds and exert forces onto grounds, then grounds exert force against that force, isn't it ?

Thanks for giving advice. So the wrong thing raised by me is that " the ground exert a force", right? Gravity pushes us touch grounds and exert forces onto grounds, then grounds exert force against that force, isn't it ?

So wastes of energy in energy flow are mainly the ATP from respiration and heat loss,right? What's the difference between heat loss and loss by ATP?

So wastes of energy in energy flow are mainly the ATP from respiration and heat loss,right? What's the difference between heat loss and loss by ATP?

What's chem 101?

What's chem 101?