GOOD AFTERNOON SIR,
MY QUESTION IS THAT, I UNDERSTAND EVERYTHING IN MATHS IN CLASS BUT WHEN I PRACTISE IT MY OWN, I DID NOT ABLE TO IT .
SO, WHAT CAN I DO FOR IT ?
GOOD AFTERNOON SIR,
First of all it is good to know that you practice maths at home on your own. Practicing is a good habit as it reaffirms your theory. Now, your problem is that you understand everything in class but you are not able to do the sums yourself. My immediate question is if you take notes in the class… Nobody can remember everything taught in the class. Take notes in the class about whatever teacher teaches. When sums are being solved in the class, do make your own personal notes (like notes to yourself) about how you went about in your thought process while solving it. At home, just go through those notes - your teachers' and yours once and it will help you immensely.
Also, I will stress on to read the theory before practicing. Many a times we jump ahead in solving questions and miss out on theory. Our base remains weak and then we face problems in solving difficult questions.
So, for now, my advise to you will be to make notes, revise them before you do your own practice, and to read theory. Try it out for a week to 10 days.
If it suits you - great!. Do write back with the updates.
my question is that , why does the astronauts who spends months on space tend to loose bone strength?
Well your question got me thinking too… I really don't know the answer to your question! But yes, having studied science, my mind automatically started searching for some plausible reasons. Here is my thought process…
Thought about quality of air, lack of physical activites, effect of lack of gravity…
Remembered about Discovery Channel videos where astronauts run on treadmills in space stations to keep themselves fit… and not just 'lie around'…. Having cooked up some reasons, I decided to google for it - My favourite thing on the net (along with wikipedia!)…
Found the following news snippet - http://www.msnbc.msn.com/id/28860055 …where it talks about the same issue you raised. Googling further, I got the following link too - http://science.nasa.gov/headlines/y2001/ast02nov_1.htm
The answer isn't evident or very clearly written. But then one can try to connect things like the lack of gravity might be causing the bones to be having very less activity. Also, since the bones aren't in their natural conditions of gravity - they become weak.
It isnt still very clear that how it happens… But we at least know why it happens!… Do go through the links…