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Applies to questions of primarily educational value - not only questions that arise from actual homework assignments, but any question where it is preferable to guide the asker to the answer rather than giving it away outright. Please READ THE GUIDANCE IN META before asking homework-like questions.

4
votes
Assuming your height is $2m$, the earth is a perfect sphere of radius $6400km$, $OM$ would be $\approx 5km$. This can be achieved through basic trigonometry and approximations. Here is a very rough di …
answered Sep 11 '15 by sarat.kant
0
votes
There is an exact solution to the problem. You can consider each point on the sphere by specifying two parameters ($r$ and $\theta$). Now since you know each points velocity vector you can calculate i …
answered Apr 21 '16 by sarat.kant
2
votes
Yes, the conservation of momentum is valid. The photon and the Hydrogen atom acquire equal and opposite momenta when the photon is emitted. However you must be a little careful when you are calculatin …
answered May 11 '16 by sarat.kant
1
vote
The last second of it's upward motion means that, at the end of that second, the object is at rest. It will start falling back downwards after that. Now since we know that the body experiences constan …
answered Sep 4 '15 by sarat.kant
0
votes
I'm assuming that you are reading the temperature of the resistor here. Now if $V$ is the voltage applied across a resistor $R$, the power generated by joule heating by the resistor would be $\frac{V^ …
answered Sep 21 '15 by sarat.kant
1
vote
Both are right. The first approach gives the compression where the net force on the object is zero. The second approach gives the compression when the velocity of the object is zero. When the block fa …
answered Sep 30 '15 by sarat.kant
1
vote
Whatever $CO_2$ you ingest will ultimately be released from your drink in your stomach and will come out as burps. The solubility of $CO_2$ is $90cm^3$ per 100g of water at 1 bar pressure and room tem …
answered Oct 5 '15 by sarat.kant