Serendipity

Here's the phrase: Dele manam barat tang shode azizam!

Also, do you know any translation website that would translate this type of written Farsi into English?

Two identical boats travel through still water at 3 m/s. They start from the same point on the

bank of a river and travel the same distance from the starting point and then return to the

starting point. One boat takes a path parallel (and anti parallel) to the current while the other

has a path that is perpendicular to the current. It takes one boat twice as long as the other

boat. How fast is the current in the river flowing?

So I drew out a vector for both boats but the problem doesn't give us the distance of the river so I can't use the formula v = d/t but I know I can use pythagora's formula: v(current+boat)^2= Vboat^2 +Vcurrent^2. Also, the comparason of one boat taking longer than the other throws me off, I'm thinking I should take it into account for one of the boats' vectors but no clue how. Any suggestions for this problem?

An astronaut ties a rope attached to his spaceship around himself and pushes off of his ship to a bag of gold in space. However, the rope breaks as he reached the bag of gold. How does he get back to his ship before his oxygen runs out with his gold?

An astronaut ties a rope attached to his spaceship around himself and pushes off of his ship to a bag of gold in space. However, the rope breaks as he reached the bag of gold. How does he get back to his ship before his oxygen runs out with his gold?

According to you.

I've been friends/coworker with this guy for about 2 and half years and suddenly he has stopped answering my texts and ignores me whenever we pass by and refuses to make eye contact. What reasons would he suddenly shift like this? He recently has starting dating, first official girlfriend he's had since we've been friends, so could she have told to stop talking to me? The last time we talked(about 2 months ago) I had invited him out with friends which he decline then I later texted him that night seeing how his night was which he didn't answer. Our friendship was a somewhat flirtatious one where we would tease each other, every other weekend I would invite him out which he often had excuse to decline and we often ate lunch together but no more than that. I've given him space and have only texted twice since we last talked to avoid being clingy but now I'm ignoring him as well and the situation is now awkward where I go to great lengths to avoid him. I feel this has gotten completely immature but I don't know what I should do: continue ignoring, make contact or just plain confront? Why could he possibly be avoiding me or be angry with me?

I've been friends/coworker with this guy for about 2 and half years and suddenly he has stopped answering my texts and ignores me whenever we pass by and refuses to make eye contact. What reasons would he suddenly shift like this? He recently has starting dating, first official girlfriend he's had since we've been friends, so could she have told to stop talking to me? The last time we talked(about 2 months ago) I had invited him out with friends which he decline then I later texted him that night seeing how his night was which he didn't answer. Our friendship was a somewhat flirtatious one where we would tease each other, every other weekend I would invite him out which he often had excuse to decline and we often ate lunch together but no more than that. I've given him space and have only texted twice since we last talked to avoid being clingy but now I'm ignoring him as well and the situation is now awkward where I go to great lengths to avoid him. I feel this has gotten completely immature but I don't know what I should do: continue ignoring, make contact or just plain confront? Why could he possibly be avoiding me or be angry with me?

I've been friends/coworker with this guy for about 2 and half years and suddenly he has stopped answering my texts and ignores me whenever we pass by and refuses to make eye contact. What reasons would he suddenly shift like this? He recently has starting dating, first official girlfriend he's had since we've been friends, so could she have told to stop talking to me? The last time we talked(about 2 months ago) I had invited him out with friends which he decline then I later texted him that night seeing how his night was which he didn't answer. Our friendship was a somewhat flirtatious one where we would tease each other, every other weekend I would invite him out which he often had excuse to decline and we often ate lunch together but no more than that. I've given him space and have only texted twice since we last talked to avoid being clingy but now I'm ignoring him as well and the situation is now awkward where I go to great lengths to avoid him. I feel this has gotten completely immature but I don't know what I should do: continue ignoring, make contact or just plain confront? Why could he possibly be avoiding me or be angry with me?

Okay, I need help with the following question:

You are observing a distant star that is surrounded by a thin, cooler layer of gas. The allowable energy levels for electrons in this gas are Energy level 1= 3.00e-19J, Energy level 2=5.00e-19J where E0 is the position where it has no energy. Based on this, how would this affect the spectrum of the star as observed from Earth? Which wave lengths would be affected? [Hint: the energy difference between any two energy levels is relevant.]

So, by finding the energy differences, I found the wave lengths which are: 397nm, 663nm and 994nm. But, I’m stumped as to how this would affect the spectrum of the star? Is it that only these wave lengths would be viewable from Earth because the gas surrounding the star blocks out all other possible wave lengths emitted from the star itself?

Okay, I’ve been working on the following:

Consider it to be October 11 and Earth is at the “three o’clock” position in its orbit (so to the right of the sun). Where would you place Jupiter in its orbit if it rises five hours after sunset? Assume circular orbits and this is a fictitious scenario and does not represent the actual positions of the planets at the present time.

Okay, I’m thinking you have to use the Synodic period of Jupiter to find the answer to this question, which is equal to 399 days but would I also need to use the Sidereal period of Jupiter as well? (11.9 years). I’m unsure about how to proceed in the question because it has given me the time it rises in the sky and I don’t know what to do with this information. Do I solve this quantitatively or qualitatively?

Okay here’s the following question:

When we see the sun, it appears to be a bright disk in the sky. Calculate the smallest percentage of the sun’s “disk” that could be “covered” by the Moon during a solar eclipse. Assume that the Moon is centered over the disk of the Sun during the eclipse. Do not assume circular orbits.

For Data you’re given:

Average orbital radius: moon: a= 3.84e8m earth: a=1.496e11m

Orbital eccentricity: moon: e=0.055 earth: e=0.017

Radius: moon: r=1.738e6 m earth: r=6.96e8 m

Alright, I think the way to solve this is by finding the angular diameter for both the sun and the moon then doing a fraction of one angular diameter over the other to find the percentage. But what’s throwing me off is the “do not assume circular orbits” part and all the data given for Earth. I don’t understand what both of these have to do with the question. How are they relevant?

I'm interested in hearing answers based on personal experience.