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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
46,947 
I need convincing that evaporative cooling is refrigeration in the sense of a heat engine run backwards.
It has the...

T 05:54 PM
techmologist

0 
2 
http://demonstrations.wolfram.com/FaradayDiskDynamo/HTMLImages/index.en/popup_3.jpg
disk and magnet spin together...

T 05:33 PM
DaleSpam

12 
246 
I'm having some difficulty setting up a problem. I'm trying to model the temperature of a thermistor connected to a...

T 04:49 PM
Chestermiller

25 
192 

 
 
 
Whay is it that when we release air from our mouth when it is little open then the cold air is released but when we...

T 02:56 PM
adjacent

2 
64 
Hello Forum,
The 1D harmonic oscillator is an important model of a system that oscillates periodically and...

T 02:17 PM
olivermsun

9 
113 
Hello, I am new here.
I was reading Wangsness electromagnetic fields and he delves into a short discussion about...

T 01:59 PM
IamStupid

0 
52 
If you apply 100 volts to a 10:1 transformer you will end up with 10 volts out. If you put a 10 ohm resistor on the...

T 01:46 PM
Philip Wood

37 
1,624 
I've read a similar thread, but I believe I have something extra to ask, so please bear with me.
I've been thinking...

T 01:19 PM
Wes Tausend

1 
79 
In a martial arts breaking demo (boards, concrete blocks, or whatever) the amount of pain one's hand or other body...

T 12:35 PM
CWatters

2 
78 
I have some questions about electrons flow.
1)Lets say we have a simple circuit with a metal wire and a battery...

T 08:21 AM
Andrew Mason

1 
110 
Why doesn't the higher mass cart stop after hitting the lower mass object? Is this due to an imperfection in setting...

T 07:45 AM
Lok

5 
136 
Hi,
I would like to know what is the surface temperature of a material when it is radiated from another material at a...

T 04:59 AM
marco75

5 
132 
Is there a mathematical relation for the temperature change when a fluid flows through a pipe from one end to another?...

Y 10:02 PM
Chestermiller

43 
7,152 
hi pf!
i had an easy question on how to calculate the reynolds stress from the RANS equations. Reynold's Stress is...

Y 01:40 PM
bigfooted

3 
111 
Consider a light, an L.E.D for example, turning on and off once per second. For humans, we will look at it and think...

Y 01:36 PM
carrz

11 
676 
Why is it that in bulk matter , though molecules are closely packed electrons are no longer attached to individual...

Y 12:12 PM
sophiecentaur

1 
77 
Good Morning,
First, let me preface my question by stating that I do not have a background in physics so my...

Y 10:06 AM
enorbet

3 
117 
I was trying to solve this problem yesterday and I was not able to. I looked it up its solution but my mind is not...

Y 08:14 AM
Chestermiller

7 
797 
There is a homopolar generator on a train moving at 215 km/h. The magnet of the generator is attached to the disk so...

Y 05:56 AM
DaleSpam

52 
965 
Hi guys,
I'm studying a classical ideal gas trapped in a onedimensional harmonic potential and I first want to...

Y 01:35 AM
Jano L.

4 
167 
Hi, I was hoping to get some pointers from you guys for references/ where to look to get help for the following:
I...

Jul2914 06:37 PM
iScience

2 
115 
What is voltage and how to look at it intellectually?

Jul2914 02:04 PM
jeffery_winkle

32 
3,229 
Hello.
If you give a styrofoam cup to pressure cooker, it expand first, but than it extremly reduce. It reduce...

Jul2914 05:03 AM
davenn

8 
238 
After studying the methods of Lagrange and Hamilton for a bit I still find myself uneasy about the action. I don't...

Jul2814 06:24 PM
Delta Kilo

16 
639 
How earth is considered to inertial frame of reference?

Jul2814 04:20 PM
olivermsun

3 
201 
Hello,
In an electric circuit, let's say we have a resistor and a generator(Voltage source). The electric field...

Jul2814 05:59 AM
tonyjk

22 
668 
The following is my take on friction. I wish to verify if my hypothesis is correct.
When trying to visualize...

Jul2714 11:24 PM
DeltaČ

7 
484 
Are there any experiments or theories about the relation between magnetic dipole moment orientation and velocity...

Jul2714 08:02 PM
carrz

4 
290 
Hello, everyone.
I saw this experiment: https://www.youtube.com/watch?v=klt9PNuqMC8
A man is doing experiment with...

Jul2714 04:32 PM
davenn

1 
199 
Just a quick question. Let A and B be two points. Electrical work is defined as the amount of energy it takes to move...

Jul2714 01:10 PM
FallenLeibniz

17 
553 
Two questions:
1.) Consider a hollow conductive sphere that's initially charged. These charges will distribute...

Jul2714 12:13 AM
iScience

0 
192 
Two part inquiry
PART I
Situation: I have a Bfield and i'm pulling a straight piece of wire through that...

Jul2614 07:38 PM
iScience

2 
267 
Does all the light entering our eyes converge to a single point on the retina (assuming minimal aberration)? If this...

Jul2614 10:14 AM
ViolentCorpse

27 
1,757 
How does a water pump in a water cooler work?what are its parts .the picture of the water cooler is given in...

Jul2614 04:42 AM
kartikwat

0 
244 
Hello everyone,
I was wondering how one would calculate the threedimensional charge density (per volume) in a...

Jul2514 09:32 PM
Born2bwire

3 
363 
What does p = mv really mean? For example, why is there a physical law based upon the product of mass and velocity?...

Jul2514 05:07 PM
sophiecentaur

6 
543 
Let's suppose i want to send a message over really big (interplanetary, maybe out of the solar system) distances.
I...

Jul2514 01:08 PM
GTOM

26 
1,480 
Hello.
I'm having trouble with determining the dynamics of a rod, when one of the ends has a torque applied to it....

Jul2514 09:31 AM
Orodruin

13 
439 
Today I was taking the train to a nearby city, where we passed through some rainy region.
As the raindrops fell on...

Jul2514 08:55 AM
Andy Resnick

3 
707 