Questions tagged [experimental-physics]

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13 views

Where to purchase a high pressure electrochemical cell [on hold]

I want to purchase a high pressure cell that's corrosive resistant and can perform impedance spectroscopy tests. Is there any company out there that can make this cell? Specs: volume: 10ml pressure: ...
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0answers
20 views

How much force is required to push a liquid out of a syringe? [duplicate]

It's about 3D bioprinting and I need a calculation on how much force is required (pressing on the syringe piston) to push out the solution with known density. Moreover, there are few more ...
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0answers
30 views

Designing a submersible cooling system for rapid flow hot nitrogen gas [duplicate]

I'm trying to design a cooling system for cooling nitrogen at 300°C. My original design (which is very open to modifications) is an aluminum ring block with exterior fins and vertical holes through ...
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1answer
36 views

Issues creating a high pressure chamber for corrosive solution

I'm trying to do an experiment on high pressure's effect on the electrical impedance of a really corrosive solution. I'm aiming for at least 2,000 psi with a pressure chamber but the only material I ...
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1answer
83 views

Could a spinning permanent magnet's interaction with the Earth's magnetic field propel a boat through the water?

I am wondering if a spinning permanent magnet's interaction with the Earth's magnetic field will produce a propelling force strong enough to propel a toy boat through the water. This propelling force ...
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2answers
44 views

How to measure and verify ultrasound frequency and intensity from a cheap ultrasonic body contouring device?

Research shows that applying 1 MHz non-focused ultrasound at 3 W/cm2 may reduce subcutaneous fat thickness. In fact, high-end and expensive (costs $5000 >) HIFU ultrasonic transducers are now being ...
2
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1answer
60 views

Calculate the specific surface area of a mesoporous sample

I'm a nanoengineering student who's been stuck on the following problem for a few days. I've gone back over my professors slides, watched podcasts from an old professor, etc. etc., but don't ...
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2answers
72 views

How can I vaporize metals?

What are some common ways that I can vaporize Metals into a vacuum chamber? How can I keep these Metals in a gaseous state?
3
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1answer
36 views

Can chemical vapor deposition chambers be used to lay down thick layers of metal?

Can CVD Chambers be used to lay down thick (~1 mm) layers of metal?
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1answer
41 views

Measuring beats/bounce in a closed cubed glass

Suppose that we have a $2$ by $2$ by 2 $cm^3$ closed box, made up of glass, with thickness $0.1 cm$. Yes, it is a very small box. Let's say in that box there is a ball (also made with glass) with ...
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0answers
63 views

Equation for water rower

I have this water rower (Sunny Health & Fitness Water Rowing Machine w/LCD Monitor) : I am going to make a monitor for it (to calculate time/500m and watts). I am going to attach a magnet to the ...
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1answer
46 views

Measuring intensity of a radio wave reflected from a metal plate

I am building a Project that can pinpoint location of a pen or any object (something as small as 0.5 mm radius sphere) placed on a flat screen. I am using a ultrasound sensor (initially but i can ...
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0answers
27 views

How can I develope a water loop cooler system sustaining with liquid nitrogen? [closed]

Water will be circulated in the water pipe and liquid nitrogen tanks heat going to cool the water pipe,by the way to the water too. And fan is going to blow this cold air and heat is going to be ...
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1answer
33 views

AirFlow Measurement

I'm a software developer, who wants to create a monitoring system for an industrial airflow system. The airflow of the system is huge - between 15 and 20 cubic liters per minute. Here is my problem, ...
2
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0answers
23 views

How to apply the permeability value found from an experiment?

I have done a permeability experiment on LDPE in the presence of air using a 25mm circular specimen. At 30'C, the permeability was found to be 1.846 barrer. Now I am trying to apply this permeability ...
3
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1answer
38 views

Different Color Intenensities from simple ON/OFF RGB subpixels

I recently got interested in an electronic paper. One design that I liked was the one from Mirasol, Interferometric modulator display. However, what I don't understand, is the following: Their ...
2
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2answers
107 views

Buoyance+torque generated force

I need to design a pivot arm which is pulled up by a float (buoyancy force). In the upper positions of the lever arm, there's a mass trying to pull down. The reason that I'm presenting this problem ...
2
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1answer
112 views

What is the difference “maximum” shear stress and shear stress

Shear stress is introduced in statics as $\frac{P}{A}$. However, the maximum shear stress with neutral axis is different. It is $\frac{3P}{2bh}$ (Where $b$ is width and $h$ is height) What is the ...
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0answers
7 views

How to combine ODE parameters values from several estimations?

I would like to perform parameters estimation for a differential equation from experiment. If the value of these parameters are obtained from several experiments (repetitions) where for each ...
2
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2answers
29 views

Simulate Dust Layer on PV Cell?

Is it possible to simulate a layer of dust deposited on top of a PV cell in a controlled manner? One potential method I had was to put a given weight of a particulate/powder (chalk powder, talcum ...
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2answers
172 views

Difference between partial derivatives and derivatives in physics [closed]

Please explain me the difference between $\lim_{x->0}\frac{\partial E}{\partial x}$ and $\lim_{x->0}dE/dx$.In physics I encountered something similar while reading about Newton's Law of Fluids....
4
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1answer
173 views

How can I accurately measure the actuation force of small buttons (<1cm diameter) using home equipment?

I'm trying to measure the actuation force of buttons on the Playstation Vita, in preparation of building an external device that presses these buttons automatically. Specifically, I'm trying to ...
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1answer
95 views

Ceiling or table fan better

I always wonder in directional flow which fan would send colder.air and cool better. I am biased toward table fan as it throws fresh air while ceiling fan throws stale hot air accumaled at top. Please ...
4
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1answer
44 views

Can graphene really be made in a modest lab at home?

I have seen some resources on the Internet that claim to be able to make sheets of graphene (single atom thick lattice of hex-bonding carbon) from commercial off the shelf materials and a modest lab ...
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1answer
369 views

What is the most efficient way to ionize air?

I have a project to convert wind energy directly to electrical energy with no moving parts. The wind will enter a reducing tunnel for concentration, then go through an unobstructing de-humidifier, ...
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1answer
29 views

Magnetohydrodynamics, ionizing combustion exhaust then converting its kinetic energy to electricity

I am trying to understand how to make generation of electrical power more efficient by using Faraday's law to directly convert the kinetic energy of the ionized or easily ionizable exhaust gases of ...
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2answers
100 views

What is smallest distance you can reliably move an object?

I am trying to design a science experiment involving lasers and want to know if what I am planning to build it technically feasible. Part of the experiment requires that I make tiny nanometer changes ...
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2answers
88 views

Where is the contact point between screw spindle teeth and nut teeth?

So this is a screw press used to hmm disconnect the clamp connection (sorry if these are not the correct terms I really don't know how to translate it properly). Anyway, I think it's obvious what this ...
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0answers
29 views

Creating a rotating unit with the extended arms varying the trajectory in accordance to ODE's

I plan to mimic binary stars and their orbital decay due to gravitational wave radiation. I want to make a rotating shaft with extended arms, each being able to hold cast iron balls of specific weight,...
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2answers
1k views

How to make a pulley system with a mechanical advantage of 0.5 [closed]

Problem Hi I was working for an engineering club and we needed to do this as soon as possible: We wanted to make a pulley system with a mechanical advantage of 0.5 I know that we have to do ...
1
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1answer
56 views

On construction of a triangular interferometer like LISA [closed]

I am planning to do a project in which I plan to mimic the LISA interferometer. For this I use the fabric material, Lycra to mimic space time and use spherical balls, forming a couple and connected to ...
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3answers
290 views

Can a blimp enter Mar's atmosphere as a glider?

I saw a high altitude jump where someone had exceeded the speed of sound before the air slowed him down enough to deploy a parachute. While inflated in space could a blimp enter the atmosphere while ...
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1answer
37 views

How to drive a gear system to wear out fast

i am designing an experimental platform to test some 3D printed gears that i am designing. i want to test the durability and what i am looking for is a way to make them wear out fast. i will basically ...
3
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1answer
100 views

Recreating Focaults Pendulum

I am having issues building a recreation of Focaults Pendulum (basic, inexpensive, undergrad project). At this point, I am going to purchase aircraft cable or suspension cable unless someone can ...
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4answers
326 views

Variation of LED light as a function of distance

I'm trying to use LED's as a point source of light for a project I have. a crucial idea is that the intensity of the light of the led falls off as 1 over the distance squared as we move away from it. ...
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0answers
349 views

Why can't current tennis sensors measure actual spin in RPM? [closed]

I'm just curious if anyone thinks this can be done. I assume if it was possible somebody would have done it by now. From what I understand, Hawkeye is the only device that can measure RPM. At present, ...
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1answer
273 views

What prevents the use of electric engines to assist with spacecraft launches? (Space Shuttle Booster Supplement)

Much power is used to get rocket off the platform on the initial launch? Could electric engines used like booster rockets work similar in the way they launch planes of an aircraft carrier? The ...
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2answers
32 views

How do measures of error or uncertainty change, when the underlying variable is transformed?

If I have a measurement $A$ with uncertainty $\Delta A$, then what is the error if I do a calculation like $\frac{A}{\sqrt{3}}$?
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1answer
90 views

Need motion equations for falling ball for simulating

I am currently MS student in artificial intelligence (AI) and working on my thesis on reinforcement learning, which robot should learn by itself how to control a quadcopter. Long story short, I have ...
4
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2answers
151 views

How can I determine how many cycles to average for when taking a measurement using Lock-in Amp if I know sensor spectral noise density?

I am taking a phase sensitive measurement of an AC magnetic field using an SR830 Lock-In Amplifier and a magnetic sensor. I know I have to average over a number of measurement cycles to get an ...
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2answers
47 views

How to find out experimentally without electronic or electrical instrument to measure the vibrational frequency of some type of spring

How to find out experimentally to measure the vibrational frequency of some type of spring without electronic or electrical instrument? I am just wondering about the advance stage of the discovery of ...
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1answer
59 views

Find optimal configuration for Stirling Engine

I'm trying to figure out the theoretical calculations for a Stirling Engine system so I can determine optimal piston size, optimal piston displacement and number of pistons. I want to calculate which ...
4
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1answer
184 views

How small can you get a stream of molten steel to be at low pressure?

I'm designing a crucible / extruder, and right now it has a .6mm hole to extrude from. Will this work? A chart with various metals listed would be nice. Pictures: Click to expand
4
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2answers
127 views

Thermoplastics that are permeable to water - high diffusion coefficient

I want to know if there are some fairly common thermoplastics that allow water to pass through (by diffusion) at a relatively high rate (on the order of days). For example, PET water bottles leak ...
2
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0answers
49 views

Could magnets at the RHIC be damaged like the ones at the LHC were in 2008?

In 2008, an electrical fault led to a freaky magnetic quench at the Large Hadron Collider, which in turn released a lot of helium, damaging dozens of superconducting magnets in the process and setting ...
3
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3answers
622 views

Can superhydrophobic surfaces be used to reduce drag?

I am mainly interested in reducing drag in aircraft and I have an idea that I want to learn more about... Can a superhydrophobic coating reduce drag in water-craft such as boats and submarines? If ...
7
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1answer
180 views

Can using different types of alcohol in a cloud chamber produce different particle tracks?

The design for a cloud chamber is rather simple, and many factors can be changed without producing different results. There is one curious point that I've stumbled upon, though: The type of alcohol ...