What is the vacuum impedance ?

Can I consider vacuum as a space free from em waves or gravity waves ? If not why such a space can't exist ? And what do we mean by electric impedance of vacuum to to 273 Ohm or something like...

05 June 2019 177 4 View

Does particle density increase at low temperature ?

When we cool down a room keeping the pressure same, the gas equations imply that particle density should increase. Does this happen and if so , does it affect our human system? Thanks in advance...

05 June 2019 7,040 2 View

Os there any geometrical representation of impedance of parallel L, C, R circuit ?

We know the complex plane representation of impedance of L,C,R. If there is a tank circuit, a capacitor in parallel with an L and R and that is connected with an a,c voltage source. Can we...

05 June 2019 1,040 1 View

Is there any analytical Method to calculate the change of XRD pattern with change of impurity?

I have the XRD data for pure BCC Iron. Now I want to change the pure iron by adding carbon with different percentage. Now is there any theory of variation of XRD pattern with the variation of...

04 May 2019 5,910 5 View

What should be the thickness of antireflection coating ?

Coating is used for different purposes. When one face of beam splitter is coated with silver . Reflection of light guided by silver coating will face a pi phase differene or not ? Does this depend...

04 May 2019 5,092 6 View

What is the wavelength used for XRD ?

I am just entering into this subject . I have seen different XRD data without supplying the value of wavelength of X-RAY used . Is it that the value of wavelength is implied? One XRD machine...

04 May 2019 3,168 10 View

What is the theory of 2D XRD ?

As an optical grating , if we think a 2D lattice structure, then I thin Bragg's formula can not be used directly. May be I am wrong. I think in this way because in Bragg's formula "d" I'd there...

04 May 2019 9,090 1 View

Why EM waves are not deflected by Electric or magnetic fields ?

EM waves are basically vibrating electric and magnetic fields. So it seems that em waves should be deflected by Electric or magnetic fields . But I think it doesn't happen. Please explain the...

04 May 2019 4,487 6 View

Does dielectric discharge voltage depend on shape of the electrodes ?

Dielectric discharge voltage of air is 3 KV/ mm. So if two conducting plates are kept with a potential differene of 3kV and placed at a distance of one mm then air discharge will happen. If the...

04 May 2019 6,947 2 View

Why don't we use focusing lens for X-RAY diffraction ?

In Fraunhoffer diffraction we use optical lens for focussing the diffracted light to meet at different points of maxima or minima. For X-RAY diffraction we don't. ALSO FOR LASER DIFFRACTION WE...

04 May 2019 8,234 6 View

Joint behaviour in Abaqus is not captured well?

I am working on roof joint and trying to simulate the behaviour in Abaqus. I am successful in running the model but the final graph does not follow the experimental curve in the negative direction...

01 March 2021 6,661 3 View

What is Flat Lens Antenna?

28 February 2021 5,433 3 View

Concrete compressive strength databases?

I am looking for datasets similar to this one: http://archive.ics.uci.edu/ml/datasets/Concrete+Compressive+Strength I am looking for concretes with different types of aggregates (Recycled,...

27 February 2021 6,801 3 View

What are effects of steel jacketing on flexural strength?

Dear all, If steel jacketing is used to retrofit a reinforced-concrete (RC) column, can we use it to improve flexural strength? I understand that we leave gaps between the ends of the jacket and...

22 February 2021 1,906 5 View

Is there any kind of data available for connection properties like signal strength between UE and RAN?

Is there any kind of data available for connection strength between UE and RAN? I am looking for signal strength, the geographical coverage of RAN's in a given Tracking Area, Coverage Area over a...

16 February 2021 1,073 5 View

Can anyone direct me to an existing Validated Health Care Survey/Instrument?

Hello, I am working on a paper and looking for an existing Validated Health Care Survey/Instrument. I have been performing virtual ergonomic evaluations since the start of COVID and want to...

04 February 2021 4,756 2 View

Fracture energy of concrete at sub-zero temperatures?

Both tensile and compressive strengths of concrete increase with the decrease in temperature. With this in mind and considering that fracture energy is in direct correlation with the so-called...

18 January 2021 8,778 4 View

Will an electromagnet core be as efficient if it is made of several pieces?

If you had a design for an electromagnet core that required it to be assembled out of several parts would it still produce as strong a magnetic field as the same core but made out of a single...

17 January 2021 5,821 3 View

Why the fracture energy of concrete increases with the rise in temperature?

Given the degradation of mechanical properties in concrete under elevated temperature namely, tensile strength, modulus of elasticity, compressive strength, etc., what is the justification behind...

15 January 2021 3,651 4 View

What is interdependence theory in international relations?

I need a thesis on Independence theory in international relations, it's strengths and weakness with interstate examples

12 January 2021 4,334 2 View