Physics (from Ancient Greek: φυσική (ἐπιστήμη), romanized: physikḗ (epistḗmē), lit. 'knowledge of nature', from φύσις phýsis 'nature') is the natural science that studies matter, its motion and behavior through space and time, and the related entities of energy and force. Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves.Physics is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest. Over much of the past two millennia, physics, chemistry, biology, and certain branches of mathematics were a part of natural philosophy, but during the Scientific Revolution in the 17th century these natural sciences emerged as unique research endeavors in their own right. Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined. New ideas in physics often explain the fundamental mechanisms studied by other sciences and suggest new avenues of research in academic disciplines such as mathematics and philosophy.
Advances in physics often enable advances in new technologies. For example, advances in the understanding of electromagnetism, solid-state physics, and nuclear physics led directly to the development of new products that have dramatically transformed modern-day society, such as television, computers, domestic appliances, and nuclear weapons; advances in thermodynamics led to the development of industrialization; and advances in mechanics inspired the development of calculus.
Hey, I got an offer from UCL for physics MSc and from KCL for theoretical physics.
I'm still waiting for answers from Edinburgh regarding theoretical physics MSc, but I wanted to ask how big of a difference choosing physics over theoretical physics is.
I'm certain I would like to do theoretical...
I want to know the difference between the two circuits below , and Why don't I bundle both batteries into one 24V battery?
pls help me in this .
This is the original circuit:
And to merge the two batteries , What is the resulting value of a battery resulting from the merger?
I thought...
I need to understand the mechanics involved in performing a wheelie. That includes analyzing the free-body diagram. And considering all the factors involved in performing this manoeuvre in motorbilkes.
This might sound as a dumb and silly question but if you think about it, it makes sense. If we wrongly assume that gravity is a force just like any other, and given the fact that time is closely related to gravity and that gravitational time dilation is a thing, wouldn't reverse time travel...
Two point-like particles of mass m. The particles are rigidly connected to each other with a mass-less rod of length L. The particles are initially at rest in such a way that one particle is at the origin and the other is at the point (0, L). A point-like particle of mass M collides with a...
Hello,
I'm trying to decide between physics and electrical engineering. I like building electrical stuff, and I like solving physics problems, but my main goal is to try to build power systems that integrate things like what can be found in this paper https://arxiv.org/abs/1401.0520. I would...
So my amazing wife ( a bio-chemist and gamer) was playing a flight sim. So, I love aerodynamics, aerospace engineering, and am a serious aviation enthusiast. I see that she is flying a Boeing 747 Freighter ( a heavy large 4 engine cargo plane) and she does a vertical takeoff. So mission was to...
I'm currently pursuing B.Sc degree with major applied math and minor physics. Do you guys think is it worth to switch to comp sci as my minor in terms of employability?
im kinda confused on why can't you just use the formula P=I^2R.
Can you just use Vrms or Vamp (not sure which one is it) and the value of R which is 105Ω to solve for I
Then just plug it in the formula P=I^2R. But when i did that it the wrong answer so is this formula don't work for AC...
I am 74yo and love Physics.
If my basic knowledge of physics is correct, light is a photon.
My question is:
1. Is the reason we cannot see infrared light because the spectrum travels at a wave link our eyes cannot see?
2. Does the light from the sun have all the different waves combined, and we...
Figure 1:
im so confused on why is the internal energy not zero for the 2nd picture because i thought if the gas returning to its original states so it zero
Aerosol particles with an average diameter of 5 μm and a density of 1000 kg / m3 are spread to a room with a floor area of 20 m2 and a height of 3.5 m. How long does it take for all 5 μm particles to settle on the floor (dry deposition)? The answer should be 1 hour and 20 minutes.
So my idea was that to reach the equilibrium position, the final moment of force has to be 0 (so in the end the forces will “eliminate” each other). And I found the equation Fm=B*I*l*sinα, which should characterize the force, which affects wire with the current in a magnetic field, and Fleming’s...
Homework Statement:: I'm working on a personal project to convert objects from a simulation using state vectors for position and velocity to Keplerian orbital elements (semimajor axis, eccentricity, argument of periapsis, etc.). However, the equations I am using do not calculate the...
Hello there,
I have heard countless times about the word energy, but I still don't know what exactly an energy is. Like for example, we know the definition of a physical quantity called velocity which by definition is change in displacement (so we can easily describe what a velocity is). We...
Hello, I am learning how to use calculus to derive the formula for kinetic energy
now, I understandthe majority of the steps in how to do this, however, there is one step where I get totally lost, I will post a picture of the steps and I will circle the part where I get lost. If you see the...
I attached a file with some explanations of the variables in the code and the plot that I should get. I don't know what is wrong. Any help will appreciated.
from scipy.integrate import quad
import numpy as np
from scipy.special import gamma as gamma_function
from scipy.constants import e...
When using latex for writing problems in physics, I find it difficult to make diagrams or figures (such as circuits, atwood machines, lenses, ...) so I wonder if anyone has some recommendations of programs or platforms that can make this "drawings" easy, possibly without the necessity of coding...
Summary:: I cannot seem to get the answer to the following question.
For (a) I am using the formula 1/V= 1/U- 1/F, giving me 7.5cm. I am then adding this to 50cm to get 57.5cm. I then used -1/20-1/57.5-1/v to get **-14.9cm** which is Incorrect.
Any help greatly appreciated!
Can you, please, help me with this exercise? I know the formulas for the required parameters, but I know neither how to use them here nor in what way to solve the exercise. Plus I don't understand what for I was given the temperature
Thank you for your help and advice
My final year experiment involves vibrating a granular conveyor with the same amplitude at at different frequencies. (See picture for experiment set-up).
Between 5-115 Hz, the glass beads bounce erratically. As soon as the frequency hits 120Hz or higher, the beads remain on the surface, and can...
Hi,
I was published a post few days ago go and read it : here
and I have set a schedule to solve my issue.
I want to know your opinion and what is your suggestions ♥
I tried this but I don't know if it makes sense:
Average velocity from A to B = 22/2 = 11m/s
Average velocity from B to C = 104/4 = 26m/s
(26-11)/6 = 3.75m/s
Summary:: In need of help determining the exhaust velocity of a rocket nozzle given temperature and propellant molar mass
Greetings and salutations! My name is Robert DeVries, world builder extraordinaire. I have come with questions in search of answers.
So for the last few days I've been...
Bounce 1, Trial 1-4:
ha (height after bounce)
(0.74+0.67+0.69+0.73)/4=0,7075 this is my mean value.
Standard Deviation, s: 0.033040379335998 (calculated the value using an online standard deviation calculator)
Sample size N: 4
sx̄ = s/√N = 0.033040379335998/√4≈ 0.0165
At a 95% confidence...
I am reading this article now :http://www.cmp.caltech.edu/refael/league/thorne-morris.pdf. And i am a little bit confused about the Eq.(38a)and Eq.(38b), which means the time measured by traverller and people in the sataion, and I just think the time measured by traveller should be his proper...
Hello, I just have a quick question on deriving the kinetic energy formula using calculus. I understand most of it, I just have a question about one of the steps. here are the steps.
Begin with the Work-Energy Theorem.The work that is done on an object is related to the change in its kinetic...
I really want to know which answer is correct. I don’t really know if I should include velocities to the left as negative velocities in the equation. Is it -1 or 4.33? Please help! Thanks!
I am having some difficulty understanding what "recoil" really is with respect to momentum, force, and and time.
On the one hand, momentum is considered to be the product of mass and velocity or perhaps the product of the sum of masses and some velocity, or some variant of P=mv, where P is a...
I have been assigned by my tutor to design a hydraulic guillotine (rubber bale cutter).
After designing its features of the hydraulic, cutting blade etc.
I tried to calculate the force needed of cutting a piece of Rubber bale (Natural as reference) having an ultimate tensile strength of 30 MPa...
Hello am currently an undergraduate student. My major is CSE. But I am very much interested to do my masters and then PhD in theoretical physics/mathematical physics. Is there any university that admits CS graduates for these courses?
I have looked up some universities that offer these courses...
This question consists of two parts: preliminary and the main question. Reading only the main question may be enough to get my point, but if you want details please have a look at the preliminary.
PRELIMINARY:
Let potential due to a small volume ##\delta## at a point ##(1,2,3)## inside it be...
What I’m looking for is some new avenue of physics for a scientist in the Star Wars galaxy to be studying. They probably know what dark matter and dark energy are since Starkiller Base is powered by it. I’m sure they know about how the universe began, why it’s expanding and what it’s fate is...
I've been reading Griffths' intro to elementary particles and I encountered this symbol that looks similar to "M" called amplitude, which can be calculated by analyzing the Feynman diagram of an interaction. What exactly is it? When I hear amplitude I imagine waves, but not sure what this one's...
The pure energy released from antimatter annihilation can there be any use of this clean energy for research purposes like the use of light in LIGWO for gravitational waves study can we use it efficiently like light in LIGWO I think we can and it could lead us to reveal mysteries of universe
These questions keep appearing in my past-papers and yet at no point in the course notes can I find a worked solution. Unfortunately I'm not sure where to start. My initial thoughts were regarding getting an equation using known values but w.r.t. to t and integrating for v, but like I said I...
if we have known the density functionρ(r),and then we can calculate the total mass of a spherical body. M=integral of ρ. Now we will say that body has mass M, but I think it is wrong. according to special relativity, mass is equal to energy, so we can also say that body has total energy M,but i...