Recent content by Muhammad Danish

Thank you so much! It was so confusing to me. My doubts are clear now. Thanks again!

Yes. It is inversely proportional to square of radius. So if radius would increase, g would decrease and as a result V will decrease. While on the other hand if radius increases, V decreases. So ultimately V should be inversely proportional to the square root of R. Right?

We have 2 different formulas for escape velocity. and . If we look at the first formula we see that escape velocity is inversely proportional to the square root of Radius of Earth. While in the second formula, escape velocity is directly proportional to the square root of Radius of Earth. We...

These explanations confuse me:

Lead bullet, because it will not compress on hitting the bear whereas rubber bullet will compress..

Which bullet of same momentum is more effective in knocking a bear down? Lead bullet or rubber bullet?

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By removing ''| |'' from h, the other side will become negative?

How will it become negative? If I use the equation |a| = |h| |b| then how can I get a negative value of h?

If we make |h| the subject, it will be |h|= |a| / |b|. The answer will be positive. So | | signs will reverse the signs and give a negative value of h?

After finding h, can we solve this question by matrix method? (The way I did)

Homework Statement Homework Equations Is my solution correct? If not then please point out the mistakes and help me solve this question in the right way. Thanks in advance. The Attempt at a Solution

Can we use Gold Leaf Electroscope to check whether a radioactive material gives off Alpha particles?

@cnh1995 Can you guide me further?