Year Definition and 999 Threads

After seeing so much higher-level physics and proofing for special relativity, I imagine I'll need to take this at some point to continue do grad-level physics. I'm taking calc III at the start of year two, and then on to diff eq. When should I take linear algebra in that case? My adviser seemed...

Hi, I have one year of undergraduate classes left. I am trying to figure out how best to prepare for my applications to an AMO physics program (hopefully highly competitive). My first question is: how much importance can one class have? Maybe I am stressing too much about trying to make myself...

I have just finished my first semester of third year undergraduate physics, and have a 3-4 week break before my next semester, in which I will be taking a third course in electromagnetism (classical electrodynamics). It is my second course with a full focus on electromagnetism, since in first...

Hi all Trying to improve my level of maths and would like some help with the below question please. A 10-year lease with annual rental payments to be made at the end of each year, with the rent increasing by 2% each year. If the first year rent is £20 and the OCC is 10% per year, what is the...

I'm going to Uni in October and want to get a head with maths for physics NOW so its not so daunting when I am there. What textbooks/resources are an excelent introduction to physical mathematics? Thanks Nathan

The SI definition of a second was originally based on 1/86 400 of a day - but the Earth's rotation is a) unsteady and b) changing so it was changed to a defined number of cycles of an atomic clock. Was there a specific day for which the atomic clock was calibrated? Put another way, why were 9...

Greg Bernhardt submitted a new PF Insights post Ask the Advisors: What academic advice would you tell your 18 year old self? Continue reading the Original PF Insights Post.

Just got rejected by nearly all of my grad schools (one hasn't reply but the chance is pretty small). The funding is super harsh this year in my field and even worse for a student from China. Is there any way for an international student to take a gap year for physics research in the U.S? ( My...

I am a physics freshman in Europe where we have 3 year undergrad programmes. I am just over the first year of Multiple Sclerosis and just when the school started in october last year, things went very very bad. I was super ready for UNI and I started off very well with awesome routines, but I...

Hello there, I'm a senior year student.physics is my favorite subject, but I somehow only get B's .I would like to expand my knowledge in physics vastly.I would like to know if there's a book which contains all the concepts a senior year student should know and much more. It would be a...

Homework Statement Kepler's Constant for any object or planet orbiting the sun is 3.36x1018m3/s2. Calculate how long a year is for Pluto given the "radius of object" is 3.0x106m and the "mean radius of orbit" is 5.9x1012 Answer: 7.82x109s Homework Equations K = T2/R3 The Attempt at a...

http://www.dw.com/en/measles-cases-soaring-in-europe-who-warns/a-42645701 immunization rates have fallen to 85% for 2-year olds in Italy

Homework Statement Homework EquationsThe Attempt at a Solution [/B] the force resultant = (100i +620j +800k) = 379 N moment result is (100i-620j+800k) = 1017 which is not correct! I calculated the moment of all forces about point O using cross product so... (-3i + 2j) x (-200j) + (-3i +2j) x...

Homework Statement Part C ) help Homework Equations So far.. Moment resultant = 1800i +3200k , magnitude = 3070 N*m Force resultant = 500i +300j + 800k , magnitude = 990 N The Attempt at a Solution For the location, I'm not getting x = 1.16, y =2.06. Instead , I am getting Mx = Fr*y --> y...

<< Mentor Note -- Thread moved from the technical forums, so no Homework Template is shown >> Okay, so i am having severe problems with figuring out what i did wrong... I am given : F1 = 250 and F2 = 90 The correct Force result is = 245 i +228 j with magnitude of 335 . The moment given is...

I am almost done with my BS in physics now, but I am seriously concerning and even panicking about my future career. Before I entered college, I thought I will be able to pick up everything I needed career-wise and is confident in my decision-making ability, so I haven’t worried too much about...

says NASA, NOAA and an independent group Berkeley Earth. Science news article here with a nice gif of average temps going up since 1884.

My brother and I are thinking about the problem that NASA has with sending signals to Mars rovers, and quantum teleportation, is in an instant, therefor we thought you could use that, so we just have a few questions for you. We know this is not possible, since particles can’t teleport for...

I was fascinated with physics since i was 14, when i actually began my learning journey, i got into Newtonian mechanics and eventually learned some electronics and programming. Noticing the math that was involved, i decided to first get started with math before i proceed into learning physics...

For all of you that celebrate Christmas, Have a happy one and a great new year Christmas is all ways a good time for us as this is the only time all the family get together. We usually hire the caff or the church hall so we can all fit in, in our house is way to small to fit every one in For...

Yeah who hoo, I did my first year of college. All I did was did all my homework at the library for hours on end and completed all my classes. I used to think high achieving students were born smart. Now I know that the just spend endless of hours at the library. All of my classes are really...

whats the deal with February. is the month 28 days or 29 days? every 4 years we have 1 extra day? what the hell. every year should be almost exactly the same length.

I am in a small school in North Dakota and will have four students in the class next year. I have been here two years after retiring from another state. Two years ago they took an online physical science class and from what I can figure out they learned very little to use for background. They...

Hello every one, End of terms papers always are weird and non natural for me. This is a senior class about solid state physics and we are asked to write a 5-10 pgs term paper on a certain topic. My question is how do you go about formatting this kind of paper? Abstract(??) ->...

I am doing a GT project for elementary school. The questions I have to ask are not too complicated, and I only have 2 questions. I know that during the teleportation of a particle the scientists are using quantum entanglement, but how do the scientists actually entangle the particles, and how...

[Edit, Dec 22] Science selected cosmic convergence (observation of the collision of two neutron stars) as their Breakthrough of the Year. The winner of the people's choice was gene therapy success (successful clinical trial of using gene therapy to treat childhood neuromuscular disease)...

If I say that a star will die after 50 million light years, can I also say that that after 50 million EARTH years, the star will die BECAUSE DISTANCE AND TIME ARE INTER-CHANGABLE (if a airplane travels from point A to point B and the distance is 200 miles, I can also say that the distance is...

I have entered this section of the forum and found references to Star Trek. This series once left me wondering. It was a chapter from the first era. Spok travels to the 1930s on Earth and his communicator breaks down. Asking, he manages to reach the laboratory of a scientist of 1930, who...

It's in the year 2050 and private spacecraft are as cheap and plentiful as Cessna Skyhawks were 40 years ago. I'm a well-endowed spacefarer looking to get my own spacecraft and license; what physics am I going to need to know to operate my craft around celestial objects, e.g. the earth...

Hi, I am a fourth year physics student currently enrolled in a research project course with a supervisor. It's a research in optics and I need to learn about some nonlinear optics. For the report, I want to write about what I have learned during the term, for instance, Rayleigh and Raman...

http://worldfossilsociety.org/2017/10/wfs-news-archaeology-fossil-teeth-discovery-germany-re-write-human-history/ It's just some teeth, but the researchers are scratching their head(s), over whether human history will have to be re-written. "The first paper on the find will be uploaded to...

What is the average power consumption in watts of an appliance that uses 6.65 kW*h of per day? 6650/24=277 W b) How many joules of energy does this appliance consume in a year? What is the conversion factors for b)?

I am very new to electronics and only use it as a hobby. My father bought the soldering iron, but never used it. Manufactured in East Germany (DDR). It came with some kind of a "dark cream" and a white thingy - I do not know what are those for. I have started to look at videos on Youtube "how to...

Hi, I've just finished A Level Physics, and after a gap year I'm headed to do Physics at Exeter. I'm looking for a textbook or online course or something that has lots of A Level and (maybe slightly higher) Physics questions that I can work through over the course of this year. Does anyone have...

Hello physics forums. I'm a freshman at a top school for physics and have two general options for my track this semester. (1) I can take the standard multivariable and linear algebra class that provides an introduction to proofs and an extremely rigorous first year mechanics course. The average...

I'm starting my first year of university this September, and I'm trying to pursue an combined honours in mathematics and physics. I'm starting the standard physics course in first year, covering classical mechanics and electromagnetism and some special relativity, but I'm most worried for the...

Hey! So I posted something similar back when I was deciding what to apply to at university and whether or not I should go for physics or not. I'll be starting my concurrent program with a BEd. & astrophysics this fall. Kind of worried about it now. I'm commuting 3 -4 hours a day and have...

I have a choice if settling for an average degree at an average university, or do a foundation year at a prestigious university and get a specialised degree? Any advice? I also intend to advance to a masters and a Phd, so the foundation year will add an extra nearly £10000 of student debt. Thanks.

Hello there, I am currently a senior undergraduate Astronomy and Astrophysics major at Villanova University. With the GRE and graduate school applications coming up I have been wondering if it would be beneficial for me to either take a gap year or to possibly take a 5th year of undergraduate...

Hi! I just graduated from high school and uh welp, despite the fact that I didn't do well this year, I loved physics way too much to not continue with. If everything is hard in uni and will make me feel like I'm dying, I might as well like how I'm dying :p. Anyways, I was wondering what to...

Homework Statement Hey there :), I am in year 11 and my teacher has assigned me with this "challenging question". 12. A motorcyclist leans his machine over so that it makes an angle of 55 degrees with the surface of the track as he negotiates a corner. a.) If (due to the treat on his tyres...

Hello, I am currently in India and have completed the standard 12 years of schooling and eventually want to get into Physics academia and research. Now I currently have a choice between a three year standard science degree(BSc honours in Physics) and a four year engineering degree(BTech in...

I was admitted to a very good undergraduate physics program (Columbia University), but I think I would like to take a gap year (defer my admission) to prepare my self better. I do feel a bit intimidated as I come from Colombia and I would prefer it if I could further my studies before going to...

Hello. So due to some life circumstances i was not able to finish all my coursework of my 3-year BS.c program last year. Thus i have about 24 credits I will take next year. My plan was to finish those courses, and then along that take courses in another university, in biochem on the side. That...

Hi, I am just oging into Physics exam year and I am curious what I should expect in the course (High School) I am just wondering ifanyone knows and would be kind enough to help me with this? Thank you to anyone who does.

I just successfully completed my first year for a Ph.D program in a top 10 Ivy league school and I must say it was the hardest year of my life. I would work 12 hours a day and on average spend 8 hours on a single problem in my problem sets. Luckily I am done with all of my classes and quals and...

This will be fairly easy to do, even in the eyes of a Year 7 Find x when $$\left({1-\frac{1}{2}}\right)\left({1-\frac{1}{3}}\right)...\left({1-\frac{1}{2017}}\right)=x$$ Remember: Year 7 and 8 maths only!

Hello, I'm currently on a BSc Physics course and I need some ideas for my final year project. I'm mostly thinking about Climate and Astronomy or a mixture of both would suit me more. Regards, Jadaav.

Hi all, I got accepted to 2 Astrophysics phd programs ( University of Connecticut and the University of Cincinnati). To be honest, I am not thrilled by the prospect of attending either school but my only other option is to retake the GREs again and wait another year to attend graduate...

I teach a first year Physics course. The incoming students (grades 10-12) have little to no Physics background. We are making some modifications to our work and energy unit. One modification that has been discussed is what to do about kinetic friction. At present, we account for friction as a...