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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
46,947 
Someones like teachers in my country says energy is vector and scalar .
Is that true ?
Anyone can prov that ?

Oct2312 08:02 AM
Studiot

7 
10,790 
Hi there,
I have noticed that when the wadding pool I work at is draining, a small whirlpool appears over the drain...

Jul1211 10:20 AM
chrisbaird

1 
1,378 
Hi all,
I am wandering if I can apply the KramersKronig (KK) relations to the complex wavenumber k(ω) = k'(ω) + i...

Feb1014 02:52 PM
maajdl

1 
257 
I need to calculate the the load F (in multiples of W) required to keep the link ABC in equilibrium under the action...

Sep2710 11:43 PM
bijesh_msg

0 
877 
From theory, we know that Boltzmann entropy for a given distribution, defined through a set of occupancy numbers {ni},...

Dec2112 09:08 AM
Rap

1 
791 
I was reading in my geology book (Earth: An Introduction To Physical Geography, 7th ed. by Tarbuck and Lutgens, 2002,...

Oct2110 03:48 PM
Studiot

9 
2,706 
I am looking for educational derivation( or any available and detailed) of the key principle of statistical...

Apr2308 01:28 AM
bilha nissenson

12 
2,469 
When a cue ball is driven into another ball, it is either not accelerating or decelerating at impact. It has momentum...

Aug911 12:14 AM
rcgldr

1 
1,160 
If I combine 2 laser beams of different wavelengths, would I get a beat frequency of the difference between the 2...

Oct1511 02:46 PM
xts

2 
1,193 
I went for a run and measured time and distance. I wanted to estimate how many calories I used.
Suppose a ran a...

Dec1307 07:17 AM
Shooting Star

1 
2,532 
Hi
I am new to this forum. I am an amateur blacksmith/machinist/all around tinkerer. I took a class with a...

May2814 07:33 AM
Nugatory

4 
196 
Okay, first a brief intro. I studied math/physics extensively as an undergrad...but that was over 10 years ago now. ...

Sep310 09:08 PM
Bill M

2 
923 
Hello,
I'm trying to figure out a method of calculating the work done by friction on an object sliding down a...

Feb1711 04:32 AM
tinytim

14 
3,922 
If the crest of one light wave meets the trough of another light wave of the same frequency and intensity they...

Feb1708 02:04 PM
Jakell

1 
3,903 
How do I calculate the force (in newtons) acting on a conductor moving through a magnetic field? This is in relation...

Apr2407 06:29 AM
bill nye scienceguy!

6 
1,752 
does a high dryness fraction mean that the steam is dry or wet?

Nov2707 09:52 AM
bill nye scienceguy!

4 
18,573 
i need to find max shear stress at a point on a plate (with a hole) under tension. i found using experimental data the...

Dec607 10:54 AM
FredGarvin

1 
4,308 
if there is a decrease in pressure at constant temperature will there be an increase in entropy?

Dec2007 04:31 PM
Andrew Mason

7 
5,717 
what exactly is the cutoff ratio, in physical terms?

Jan208 03:57 PM
brewnog

2 
3,954 
I want to calculate the temperature on the outside of a pipe which has a heated fluid flowing through it. If I know...

Jan2309 06:14 PM
henxan

2 
7,927 
I am in the final year of an MEng in mechanical engineering, working on my Final Year Project. I've been designing a...

Nov1709 08:19 AM
bill nye scienceguy!

0 
575 
I guess this question applies to deriving empirical equations from any data set but in my engineering studies I've...

Mar2310 02:16 PM
Naty1

1 
2,506 
As I was sitting at work the other day productively watching an aeroplane fly across the window I started to think of...

Feb2812 07:49 AM
Hassan2

5 
708 
Although continuity equation is often part of fluid mechanics, does it have an application in air flow? For example,...

Jun2013 07:31 AM
boneh3ad

3 
577 
Hi,
I do not know how to drive an experession for energy loss of damped oscillator.I know that:
X(t)=A...

Oct305 08:14 PM
Bill12

2 
4,754 
I have an application (clothes washer) which requires a drive design such that:
The drum contains 170 lbs of water...

Nov1709 03:50 PM
Bob S

8 
831 
I would like to ask if anyone could explain how torque is consumed through a reduction ratio  in this case pulleys on...

Dec1509 06:26 AM
billinr

2 
4,816 
Hi, i have visited the forum for an explanation in cuantum theories (curious) and now i need other help.
In my...

May3008 03:30 AM
pzlded

4 
1,256 
Hi Everyone,
I am trying to calculate the exit velocity of a dart which is propelled by compressed air. Please see...

May2312 06:38 AM
haruspex

1 
920 
Hello everyone, first time poster.
A fairly basic question: What is the mechanism by which synchrotrons produce...

Sep1411 05:29 AM
Billy70

3 
1,172 
I am currently looking into how aeroplanes fly for a report which i am writing.
I understand the theory behind the...

Mar2212 11:32 AM
billy92

4 
934 
After looking into the lift force i hve been able to calculate most of the things i know. I have however been told...

Apr1512 12:34 PM
billy92

2 
1,386 
Hey guys, i'm new to these forums so i'm hoping i have posted this question in the appropriate thread.
Recently, i...

Apr3007 10:02 PM
russ_watters

3 
2,437 
Dear all
By right  hand rule, if circular motion of the object is anticlockwise in horizontal circle, so that the...

Dec203 10:42 AM
Ambitwistor

2 
6,582 
Dear all
I know that torque = rxF, but I don't understand the concept of torque. Would you mind teach me? Thank a...

Dec203 09:58 PM
enigma

1 
5,022 
Dear all
I know that E(grav) = GmM / r, Can I use Work done = F x s to calculate the P.E between two mass of the...

Dec803 03:26 AM
KLscilevothma

1 
1,247 
Hi, I'm doing a project on the Gauss gun and Newton's cradle. I'm trying to produce little models in MatLab and have...

Jul411 05:45 AM
billy_button

0 
1,385 
I'm very confuse about the idea of applying newton's law of forces and torques on rolling body. The book shows that...

Sep2910 10:56 AM
Doc Al

1 
1,096 
Hello all, I have a question. Now I'm not sure if I have this right, voltage relates to the number of turns in a coil...

Dec2410 03:28 PM
BilPrestonEsq

6 
1,317 
How many watts of power would it take to get a a mass of 1kg up to 300m/s? Leaving out friction, drag, etc.. Just how...

Jan711 04:19 PM
kloptok

10 
3,364 