Physics: help me please :cry:

[Ahmed Alaa El-shamy]

What are the scalars and vectors with all examples ?

what are the renewable sources of energy and non-renewable?

important formulas for the motion stuff like acceleration etc

 

[IsraJ]

What are the scalars and vectors with all examples ?

what are the renewable sources of energy and non-renewable?

important formulas for the motion stuff like acceleration etc

Scalars are quantities with magnitude only. eg- speed gives you the number/magnitude but you wont know the direction that object is moving in.
Vectors are quantities with magnitude and direction. eg- velocity gives you both the direction as well as magnitude of the object moving.

Renewable sources of energy are those that are will not finish off....like wind....it's never going to finish! or light
Non renewables surces of energy are those that are going to finish one day...like coal or any other fossil fuel

you can find all the important notes and formulas attached
Hope i helped....if you have any other doubt feel free to ask me

 

[Ahmed Alaa El-shamy]

Scalars are quantities with magnitude only. eg- speed gives you the number/magnitude but you wont know the direction that object is moving in.
Vectors are quantities with magnitude and direction. eg- velocity gives you both the direction as well as magnitude of the object moving.

Renewable sources of energy are those that are will not finish off....like wind....it's never going to finish! or light
Non renewables surces of energy are those that are going to finish one day...like coal or any other fossil fuel

you can find all the important notes and formulas attached
Hope i helped....if you have any other doubt feel free to ask me

thank u sis it really helps

i just have another question is there is any relation between acceleration and speed ?

 

[IsraJ]

welcome
yup........if the speed increases......the object is accelerating. If the speed is constant the acceleration is zero. Speed is the same as velocity though there is no direction in it but yeah they are same in the sense of mangnitude. Acceleration is the change in velocity over a given period of time so they are linked.

thank u sis it really helps

i just have another question is there is any relation between acceleration and speed ?

 

[Ahmed Alaa El-shamy]

welcome
yup........if the speed increases......the object is accelerating. If the speed is constant the acceleration is zero. Speed is the same as velocity though there is no direction in it but yeah they are same in the sense of mangnitude. Acceleration is the change in velocity over a given period of time so they are linked.

So that means if the speed increased the acceleration increase but if it decrease the accelration also decreases thanks

sorry last question what is meant by magnitude?

 

[IsraJ]

no if the speed increases the acceleration wont increase...it will be constant......if the speed decreases the decceleration wont decrease..it will be contant.
magnitude is a unit or number such as 40 kg is a mass and 40 is the number
or 37 m/s...37 is the magnitude

 

[Ahmed Alaa El-shamy]

no if the speed increases the acceleration wont increase...it will be constant......if the speed decreases the decceleration wont decrease..it will be contant.
magnitude is a unit or number such as 40 kg is a mass and 40 is the number
or 37 m/s...37 is the magnitude

okay kind of confused but i guess i got it thanka

 

[IsraJ]

r u sure u got it?? clear all your confusions before entering the exam hall!

 

[Ahmed Alaa El-shamy]

r u sure u got it?? clear all your confusions before entering the exam hall!

yea i have just solved a question about it and it was right

u take v31 isn't?

 

[IsraJ]

yup!

yea i have just solved a question about it and it was right

u take v31 isn't?

 

[Ahmed Alaa El-shamy]

and what do u feel ? will it be easy or hard !

 

[IsraJ]

i feel like it's going to be easy InshaAllah! cuz the pastpapers are all easy except for that they add one or two questions that are different and tricky otherwise the rest of the paper is usually easy!

 

[Ahmed Alaa El-shamy]

yarab! i wish so because i kind of have bad feeling about it!

 

[IsraJ]

dude! think positive and be optimistic

 

[Ahmed Alaa El-shamy]

lets hope for the best !

 

[Ahmed Abdullah]

I dont think i did good in paper 1 , is there a chance to get an A*

 

[Ahmed Alaa El-shamy]

I dont think i did good in paper 1 , is there a chance to get an A*

Mmmm i guess yep u still got a chance in paper 3 but u really have to do so so good ( i mean really really good )